The Film & More Reference Primary Source Documents | Further Reading This complete list of Edison's patents is courtesy of The Thomas A. Edison Papers, a project sponsored by Rutgers University. To see this list organized by execution date, patent number, and subject, and to access PDF files of every one of the 1,093 patents, visit the site's Thomas Edison's Patents pages. This list is organized by patent number. No. Executed Applied Issued Patent Title 1. 10/13/68 10/28/68 06/01/69 90,646 Electrographic Vote-Recorder 2. 01/25/69 02/17/69 06/22/69 91,527 Printing-Telegraphs 3. 08/17/69 08/27/69 11/09/69 96,567 Printing-Telegraph Apparatus 4. 08/27/69 09/04/69 11/09/69 96,681 Automatic Electrical Switch for Telegraph Apparatus 5. 09/16/69 10/27/69 04/26/70 102,320 Printing-Telegraph Apparatus (with Franklin L. Pope) 6. 02/05/70 04/11/70 05/17/70 103,035 Electro-Motor Escapements 7. 04/12/70 04/14/70 06/07/70 103,924 Printing-Telegraph Instruments (with Franklin L. Pope) 11. 06/29/70 07/06/70 01/24/71 111,112 Governors for Electro-Motors 13. 11/17/70 11/22/70 03/28/71 113,033 Printing-Telegraph Apparatus 14. 01/10/71 01/14/71 03/28/71 113,034 Printing-Telegraph Apparatus 9. 06/22/70 06/28/70 05/09/71 114,656 Telegraphic Transmitting Instruments 12. 09/06/70 09/21/70 05/09/71 114,657 Relay-Magnets for Telegraph Instruments 10. 06/22/70 06/28/70 05/09/71 114,658 Electro-Magnets for Telegraph Instruments 19. 08/16/71 08/18/71 12/05/71 121,601 Machinery for Perforating Paper for Telegraph Purposes 15. 07/26/71 08/04/71 01/23/72 123,005 Telegraph Apparatus 16. 07/26/71 08/04/71 01/23/72 123,006 Printing-Telegraphs 17. 07/26/71 08/04/71 02/27/72 123,984 Telegraph Apparatus 18. 08/12/71 08/18/71 03/19/72 124,800 Telegraphic Recording Instruments 25. 01/23/72 01/30/72 05/07/72 126,528 Type-Wheels for Printing-Telegraphs 26. 01/23/72 01/30/72 05/07/72 126,529 Type-Wheels for Printing-Telegraphs 27. 02/14/72 02/19/72 05/07/72 126,530 Printing-Telegraphs 23. 01/17/72 01/24/72 05/07/72 126,531 Printing-Telegraphs 22. 01/03/72 01/12/72 05/07/72 126,532 Printing-Telegraphs 28. 02/14/72 02/19/72 05/07/72 126,533 Printing-Telegraphs 24. 01/17/72 01/24/72 05/07/72 126,534 Printing-Telegraphs 20. 11/13/71 11/18/71 05/07/72 126,535 Printing-Telegraphs 32. 04/26/72 05/07/72 06/18/72 128,131 Printing-Telegraphs 33. 04/26/72 05/07/72 07/02/72 128,604 Printing-Telegraphs 34. 04/26/72 05/07/72 07/02/72 128,605 Printing-Telegraphs 35. 04/26/72 05/07/72 07/02/72 128,606 Printing-Telegraphs 36. 04/26/72 05/07/72 07/02/72 128,607 Printing-Telegraphs 8. 05/24/70 05/27/70 07/02/72 128,608 Printing-Telegraph Instruments (with Franklin L. Pope) 40. 05/09/72 06/06/72 08/27/72 130,795 Electro-Magnets 37. 05/06/72 06/06/72 09/17/72 131,334 Rheotomes or Circuit-Directors 46. 06/15/72 07/09/72 09/17/72 131,335 Printing-Telegraphs 47. 06/15/72 07/09/72 09/17/72 131,336 Printing-Telegraphs 43. 06/10/72 07/09/72 09/17/72 131,337 Printing-Telegraphs 48. 06/29/72 07/09/72 09/17/72 131,338 Printing-Telegraphs 49. 06/29/72 07/09/72 09/17/72 131,339 Printing-Telegraphs 44. 06/10/72 07/09/72 09/17/72 131,340 Printing-Telegraphs 42. 05/28/72 06/06/72 09/17/72 131,341 Printing-Telegraph Instruments 41. 05/09/72 06/06/72 09/17/72 131,342 Printing-Telegraph Instruments 45. 06/10/72 07/09/72 09/17/72 131,343 Transmitters and Circuits for Printing-Telegraphs 50. 06/29/72 07/09/72 09/17/72 131,344 Unison-Stops for Printing-Telegraphs 30. 04/10/72 04/16/72 10/22/72 132,455 Paper for Chemical Telegraphs etc. 29. 03/15/72 03/22/72 10/22/72 132,456 Apparatus for Perforating Paper for Telegraphic Use 31. 04/18/72 04/25/72 11/12/72 133,019 Electrical Printing-Machines 21. 11/13/71 11/18/71 12/10/72 133,841 Type-Writing Machines 51. 10/16/72 10/22/72 01/14/73 134,866 Printing-Telegraph Instruments 38. 05/08/72 06/06/72 01/14/73 134,867 Automatic Telegraph Instruments 39. 05/08/72 06/06/72 01/14/73 134,868 Electro-Magnetic Adjusters 55. 11/09/72 11/11/72 02/04/73 135,531 Circuits for Chemical Telegraphs 52. 10/16/72 10/22/72 05/13/73 138,869 Printing-Telegraphs 64. 03/07/73 03/13/73 05/13/73 138,870 Printing-Telegraphs 60. 01/21/73 02/18/73 05/20/73 139,128 Printing-Telegraphs 61. 02/13/73 02/18/73 05/20/73 139,129 Printing-Telegraphs 62. 02/13/73 02/18/73 07/01/73 140,487 Printing-Telegraphs 74. 04/23/73 05/16/73 07/01/73 140,488 Printing-Telegraphs 63. 02/13/73 02/18/73 07/01/73 140,489 Circuits for Printing-Telegraphs 54. 11/05/72 11/09/72 08/12/73 141,772 Circuits for Automatic or Chemical Telegraphs 57. 12/12/72 01/15/73 08/12/73 141,773 Circuits for Automatic Telegraphs 65. 03/07/73 03/13/73 08/12/73 141,774 Chemical Telegraphs 66. 03/07/73 03/13/73 08/12/73 141,775 Perforators for Automatic Telegraphs 58. 12/12/72 01/15/73 08/12/73 141,776 Circuits for Automatic Telegraphs 67. 03/07/73 03/13/73 08/12/73 141,777 Relay-Magnets 68. 03/07/73 03/13/73 09/09/73 142,688 Electrical Regulators for Transmitting-Instruments 53. 10/31/72 11/05/72 09/23/73 142,999 Galvanic Batteries 56. 11/26/72 12/03/72 01/27/74 146,812 Telegraph-Signal Boxes 77. 04/23/73 07/29/73 02/10/74 147,311 Electric Telegraphs 70. 03/24/73 07/29/73 02/10/74 147,312 Perforators for Automatic Telegraphy 78. 04/23/73 07/29/73 02/10/74 147,313 Chemical Telegraphs 71. 03/24/73 07/29/73 02/10/74 147,314 Circuits for Chemical Telegraphs 75. 04/23/73 06/27/73 02/24/74 147,917 Duplex Telegraphs 76. 04/23/73 06/27/73 05/12/74 150,846 Telegraph-Relays 72. 03/24/73 07/29/73 05/12/74 150,847 Receiving Instruments for Chemical Telegraphs 59. 12/12/72 01/15/73 05/12/74 150,848 Chemical or Automatic Telegraphs 80. 08/25/73 09/02/73 05/26/74 151,209 Automatic Telegraphy and Perforators Therefor 85. 04/02/74 05/11/74 09/08/74 154,788 District Telegraph Signal-Boxes 69. 03/07/73 03/13/73 11/17/74 156,843 Duplex Chemical Telegraphs 90. 08/07/74 08/13/74 01/19/75 158,787 Telegraph Apparatus 81. 09/29/73 06/01/74 03/02/75 160,402 Solutions for Chemical Telegraph-Paper 84. 10/29/73 06/01/74 03/02/75 160,403 Solutions for Chemical Telegraph-Paper 82. 09/29/73 06/01/74 03/02/75 160,404 Solutions for Chemical Telegraph-Paper 79. 04/23/73 07/29/73 03/02/75 160,405 Adjustable Electro-Magnets for Relays, etc. 83. 10/14/73 06/01/74 03/09/75 160,580 Solutions for Chemical Telegraph-Paper 73. 04/22/73 04/26/73 04/27/75 162,633 Duplex Telegraphs 87. 06/01/74 07/25/74 08/17/75 166,859 Chemical Telegraphy 88. 06/01/74 07/25/74 08/17/75 166,860 Chemical Telegraphy 89. 06/01/74 07/25/74 08/17/75 166,861 Chemical Telegraphy 86. 05/22/74 06/01/74 09/21/75 168,004 Printing-Telegraphs 101 01/18/75 01/26/75 09/28/75 168,242 Transmitters and Receivers for Automatic Telegraphs 102. 01/18/75 01/26/75 09/28/75 168,243 Automatic Telegraphs 103. 01/18/75 01/26/75 10/05/75 168,385 Duplex Telegraphs 93. 08/14/74 01/15/75 10/05/75 168,465 Solutions for Chemical Telegraphs 104. 01/18/75 01/26/75 10/05/75 168,466 Solutions for Chemical Telegraphs 105. 01/18/75 01/26/75 10/05/75 168,467 Recording-Points for Chemical Telegraphs 109. 02/24/75 03/23/75 11/16/75 169,972 Electric-Signalling Instruments 108. 02/11/75 02/16/75 12/21/75 171,273 Telegraph Apparatus 91. 08/07/74 01/15/75 01/18/76 172,305 Automatic Roman-Character Telegraphs 92. 08/07/74 01/15/75 02/22/76 173,718 Automatic Telegraphy 94. 08/19/74 09/01/74 05/30/76 178,221 Duplex Telegraphs 95. 08/19/74 09/01/74 05/30/76 178,222 Duplex Telegraphs 96. 08/19/74 09/01/74 05/30/76 178,223 Duplex Telegraphs 111. 03/07/76 03/13/76 08/08/76 180,857 Autographic Printing 97. 08/19/74 09/01/74 08/08/76 180,858 Duplex Telegraphs 114. 05/09/76 05/16/76 10/10/76 182,996 Acoustic Telegraphs 118. 08/16/76 08/31/76 12/19/76 185,507 Electro-Harmonic Multiplex Telegraphs 115. 05/09/76 05/16/76 01/16/77 186,330 Acoustic Electric Telegraphs 117. 05/09/76 05/18/76 01/23/77 186,548 Telegraphic Alarm and Signal Apparatus 106. 01/18/75 01/27/75 10/02/77 195,751 Automatic Telegraphs 107. 01/19/75 01/27/75 10/02/77 195,752 Automatic Telegraphs 125. 04/18/77 04/23/77 11/06/77 196,747 Stencil-Pens 116. 05/09/76 05/16/76 12/11/77 198,087 Telephonic Telegraphs 112. 04/03/76 04/06/76 12/11/77 198,088 Telephonic Telegraphs 113. 04/03/76 04/06/76 12/11/77 198,089 Telephonic or Electro-Harmonic Telegraphs 121. 10/30/76 11/01/76 02/05/78 200,032 Synchronous Movements for Electric Telegraphs 142. 12/15/77 12/24/77 02/19/78 200,521 Phonograph or Speaking Machines 119. 08/26/76 09/18/76 03/05/78 200,993 Acoustic Telegraphs 122. 10/30/76 11/11/76 03/05/78 200,994 Automatic-Telegraph Perforator and Transmitter 144. 02/28/78 03/04/78 03/26/78 201,760 Speaking-Machines 140. 12/08/77 12/13/77 04/30/78 203,013 Speaking-Telegraphs 135. 07/16/77 07/20/77 04/30/78 203,014 Speaking-Telegraphs 138. 08/16/77 08/28/77 04/30/78 203,015 Speaking-Telegraphs 146. 02/28/78 03/07/78 04/30/78 203,016 Speaking-Telephones 145. 02/28/78 03/04/78 04/30/78 203,017 Telephone Call-Signal 141. 12/08/77 12/13/77 04/30/78 203,018 Telephones or Speaking-Telegraphs 143. 02/13/78 02/21/78 04/30/78 203,019 Circuits for Acoustic or Telephonic Telegraphs 126. 04/18/77 04/23/77 05/07/78 203,329 Perforating Pens 124. 03/03/77 03/26/77 06/25/78 205,370 Pneumatic Stencil-Pens 98. 08/19/74 09/01/74 09/03/78 207,723 Duplex Telegraphs 100. 12/14/74 12/28/74 09/03/78 207,724 Duplex Telegraphs 136. 07/16/77 07/20/77 09/24/78 208,299 Speaking-Telephones 110. 02/24/75 03/23/75 10/22/78 209,241 Quadruplex-Telegraph Repeaters 147. 08/31/78 11/27/78 12/10/78 210,767 Vocal Engines 123. 02/03/77 03/26/77 03/25/79 213,554 Automatic Telegraphs 148. 10/05/78 10/14/78 04/22/79 214,636 Electric Lights 151. 11/14/78 11/18/78 04/22/79 214,637 Thermal Regulators for Electric Lights 129. 05/08/77 05/14/77 07/22/79 217,781 Sextuplex Telegraphs 150. 11/11/78 11/14/78 07/22/79 217,782 Duplex Telegraphs 152. 12/03/78 12/09/78 08/05/79 218,166 Magneto-Electric Machines 156. 12/31/78 01/10/79 08/05/79 218,167 Apparatus for Electric Lights 153. 12/03/78 12/09/78 08/26/79 218,866 Electric Lighting Apparatus 165. 07/07/79 07/10/79 09/09/79 219,393 Dynamo-Electric Machine 154. 12/03/78 12/09/78 09/16/79 219,628 Electric Lights 162. 03/24/79 03/31/79 11/25/79 221,957 Telephones 149. 11/08/78 11/11/78 12/09/79 222,390 Carbon-Telephones 169. 09/04/79 09/10/79 12/23/79 222,881 Magneto-Electric Machines 170. 11/01/79 11/04/79 01/27/80 223,898 Electric Lamp 157. 01/23/79 02/03/79 02/10/80 224,329 Electric-Lighting Apparatus 160. 03/10/79 03/17/79 02/17/80 224,665 Autographic Stencils for Printing 178. 03/10/80 03/25/80 05/04/80 227,226 Safety-Conductor for Electric Lights 159. 02/06/79 02/10/79 05/04/80 227,227 Electric Light 158. 01/28/79 02/03/79 05/04/80 227,228 Electric Light 163. 04/12/79 04/21/79 05/04/80 227,229 Electric Light 161. 03/19/79 03/29/79 05/18/80 227,679 Phonograph 180. 04/03/80 04/07/80 06/01/80 228,329 Magnetic Ore-Separator 175. 03/10/80 03/20/80 06/08/80 228,617 Brake for Electro-Magnetic Motors 171. 01/28/80 02/05/80 07/20/80 230,255 Method of Manufacturing Electric Lamps 128. 05/08/77 05/10/77 08/03/80 230,621 Addressing-Machine 166. 07/17/79 07/25/79 08/31/80 231,704 Electro-Chemical Receiving-Telephone 120. 08/26/76 09/30/76 12/07/80 235,142 Acoustic Telegraph 182. 06/15/80 06/30/80 02/15/81 237,732 Electric Light 213. 10/21/80 11/11/80 02/22/81 238,098 Magneto Signal Apparatus 181. 04/25/80 05/24/80 03/15/81 238,868 Manufacture of Carbons for Incandescent Electric Lamps 195. 07/31/80 08/09/80 03/22/81 239,147 System of Electric Lighting 210. 10/15/80 10/30/80 03/22/81 239,148 Treating Carbons for Electric Lamps 217. 12/03/80 12/15/80 03/22/81 239,149 Incandescing Electric Lamp 188. 07/27/80 08/06/80 03/22/81 239,150 Electric Lamp 215. 11/19/80 11/24/80 03/22/81 239,151 Method of Forming Enlarged Ends on Carbon Filaments 209. 10/14/80 10/30/80 03/22/81 239,152 System of Electric Lighting 203. 08/11/80 08/27/80 03/22/81 239,153 Electric Lamp 222. 12/11/80 12/14/80 03/22/81 239,154 Relay for Telegraphs 191. 07/28/80 08/09/80 03/29/81 239,372 Testing Electric-Light Carbons 199. 08/07/80 08/17/80 03/29/81 239,373 Electric Lamp 226. 12/16/80 01/11/81 03/29/81 239,374 Regulating the Generation of Electric Currents 200. 08/07/80 08/17/80 04/05/81 239,745 Electric Lamp 208. 09/22/80 10/07/80 04/26/81 240,678 Webermeter 218. 12/03/80 12/15/80 06/14/81 242,896 Incandescent Electric Lamp 219. 12/03/80 12/15/80 06/14/81 242,897 Incandescent Electric Lamp 224. 12/11/80 12/15/80 06/14/81 242,898 Magneto or Dynamo Electric Machine 231. 01/19/81 01/26/81 06/14/81 242,899 Electric Lighting 212. 10/21/80 11/05/80 06/14/81 242,900 Manufacturing Carbons for Electric Lamps 238. 02/24/81 03/03/81 06/14/81 242,901 Electric Meter 230. 12/30/80 01/11/81 10/18/81 248,416 Manufacture of Carbons for Electric Lamps 183. 06/15/80 06/30/80 10/18/81 248,417 Manufacturing Carbons for Electric Lights 232. 01/19/81 01/31/81 10/18/81 248,418 Electric Lamp 248. 03/30/81 04/15/81 10/18/81 248,419 Electric Lamp 244. 03/07/81 03/26/81 10/18/81 248,420 Fixture and Attachment for Electric Lamps 240. 02/25/81 03/05/81 10/18/81 248,421 Current-Regulator for Dynamo-Electric Machines 236. 01/20/81 01/31/81 10/18/81 248,422 System of Electric Lighting 194. 07/30/80 08/11/80 10/18/81 248,423 Carbonizer 247. 03/08/81 03/26/81 10/18/81 248,424 Fitting and Fixture for Electric Lamps 174. 01/28/80 03/29/80 10/18/81 248,425 Apparatus for Producing High Vacuums 214. 11/05/80 11/24/80 10/18/81 248,426 Apparatus for Treating Carbons for Electric Lamps 228. 12/21/80 01/11/81 10/18/81 248,427 Apparatus for Treating Carbons for Electric Lamps 227. 12/16/80 01/11/81 10/18/81 248,428 Manufacture of Incandescent Electric Lamps 239. 02/24/81 03/03/81 10/18/81 248,429 Electric Motor 185. 07/02/80 07/22/80 10/18/81 248,430 Electro-Magnetic Brake 223. 12/11/80 12/14/80 10/18/81 248,431 Preserving Fruit 187. 07/26/80 08/06/80 10/18/81 248,432 Magnetic Separator 233. 01/19/81 01/31/81 10/18/81 248,433 Vacuum Apparatus 196. 07/31/80 08/09/80 10/18/81 248,434 Governor for Electric Engines 205. 08/12/80 10/01/80 10/18/81 248,435 Utilizing Electricity as a Motive Power 254. 05/17/81 05/27/81 10/18/81 248,436 Depositing Cell for Plating the Connections of Electric Lamps, & c. 229. 12/21/80 01/11/81 10/18/81 248,437 Apparatus for Treating Carbons for Electric Lamps 220. 12/03/80 12/15/80 10/18/81 248,565 Webermeter 216. 11/23/80 11/30/80 12/27/81 12,631 Design for an Incandescent Electric Lamp 310. 12/05/81 12/07/81 12/27/81 251,536 Vacuum-Pump 276. 06/25/81 08/30/81 12/27/81 251,537 Dynamo-Electric Machine 269. 05/27/81 05/28/81 12/27/81 251,538 Electric Light 255. 05/17/81 05/27/81 12/27/81 251,539 Electric Lamp 189. 07/28/80 08/06/80 12/27/81 251,540 Carbon for Electric Lamps 259. 05/20/81 05/31/81 12/27/81 251,541 Electro-Magnetic Motor 249. 04/19/81 04/26/81 12/27/81 251,542 System of Electric Lighting 268. 05/24/81 08/30/81 12/27/81 251,543 Electric Lamp 262. 05/20/81 06/22/81 12/27/81 251,544 Manufacture of Electric Lamps 176. 03/10/80 03/20/80 12/27/81 251,545 Electric Meter 202. 08/10/80 08/17/80 12/27/81 251,546 Electric Lamp 270. 06/02/81 06/24/81 12/27/81 251,547 Electrical Governor 234. 01/19/81 01/31/81 12/27/81 251,548 Incandescent Electric Lamp 260. 05/20/81 05/31/81 12/27/81 251,549 Electric Lamp and the Manufacture Thereof 241. 02/26/81 03/03/81 12/27/81 251,550 Magneto or Dynamo Electric Machine 265. 05/21/81 08/30/81 12/27/81 251,551 System of Electric Lighting 252. 04/22/81 04/26/81 12/27/81 251,552 Underground Conductors 245. 03/07/81 03/26/81 12/27/81 251,553 Electric Chandelier 246. 03/07/81 03/26/81 12/27/81 251,554 Electric Lamp and Socket or Holder 242. 02/26/81 05/27/81 12/27/81 251,555 Regulator for Dynamo-Electric Machines 211. 10/21/80 10/30/80 12/27/81 251,556 Regulator for Magneto or Dynamo Electric Machines 257. 05/19/81 05/27/81 12/27/81 251,557 Webermeter 263. 05/20/81 08/30/81 12/27/81 251,558 Webermeter 298. 10/25/81 11/11/81 12/27/81 251,559 Electrical Drop-Light 168. 08/04/79 08/06/79 01/17/82 252,442 Telephone 287. 09/07/81 10/17/81 05/09/82 257,677 Telephone 273. 06/04/81 06/22/81 08/22/82 263,131 Magnetic Ore-Separator 206. 08/14/80 08/19/80 08/22/82 263,132 Electro-Magnetic Railway 286. 08/24/81 11/11/81 08/22/82 263,133 Dynamo or Magneto Electric Machine 258. 05/19/81 05/28/81 08/22/82 263,134 Regulator for Dynamo or Magneto Electric Machines 201. 08/07/80 08/17/80 08/22/82 263,135 Electric Lamp 256. 05/17/81 05/27/81 08/22/82 263,136 Regulator for Dynamo or Magneto Electric Machines 266. 05/21/81 08/30/81 08/22/82 263,137 Electric Chandelier 304. 11/07/81 11/28/81 08/22/82 263,138 Electric-Arc Light 190. 07/28/80 08/06/80 08/22/82 263,139 Manufacture of Carbons for Electric Lamps 193. 07/30/80 08/09/80 08/22/82 263,140 Dynamo-Electric Machine 264. 05/21/81 06/24/81 08/22/82 263,141 Straightening Carbons of Electric Incandescent Lamps 283. 08/24/81 10/04/81 08/22/82 263,142 Electrical Distribution System 275. 06/24/81 08/30/81 08/22/82 263,143 Magneto or Dynamo Electric Machine 289. 09/19/81 11/11/81 08/22/82 263,144 Mold for Carbonizing Incandescents 250. 04/19/81 04/26/81 08/22/82 263,145 Process of Making Incandescents 307. 11/22/81 11/29/81 08/22/82 263,146 Dynamo Magneto Electric Machine 277. 07/01/81 08/30/81 08/22/82 263,147 Vacuum Apparatus 299. 10/25/81 11/28/81 08/22/82 263,148 Dynamo or Magneto Electric Machine 279. 07/22/81 10/04/81 08/22/82 263,149 Commutator for Dynamo or Magneto Electric Machines 271. 06/03/81 06/22/81 08/22/82 263,150 Magneto or Dynamo Electric Machine 221. 12/03/80 12/15/80 09/05/82 263,878 Electric Lamp 197. 08/04/80 08/09/80 09/19/82 264,642 Electric Distribution and Translation System 164. 04/21/79 05/12/79 09/19/82 264,643 Magneto-Electric Machine 207. 09/01/80 10/07/80 09/19/82 264,645 System of Conductors for the Distribution of Electricity 300. 10/25/81 11/28/81 09/19/82 264,646 Dynamo or Magneto Electric Machine 284. 08/24/81 10/04/81 09/19/82 264,647 Dynamo or Magneto Electric Machine 291. 09/23/81 11/11/81 09/19/82 264,648 Dynamo or Magneto Electric Machine 179. 03/11/80 03/20/80 09/19/82 264,649 Dynamo or Magneto Electric Machine 311. 12/05/81 12/09/81 09/19/82 264,650 Manufacture of Incandescing Electric Lamps 359. 06/09/82 08/07/82 09/19/82 264,651 Incandescent Electric Lamp 319. 12/15/81 08/07/82 09/19/82 264,652 Incandescent Electric Lamp 317. 12/13/81 08/07/82 09/19/82 264,653 Incandescent Electric Lamp 322. 02/10/82 08/07/82 09/19/82 264,654 Incandescent Electric Lamp 360. 06/09/82 08/07/82 09/19/82 264,655 Incandescing Electric Lamp 371. 07/07/82 08/14/82 09/19/82 264,656 Incandescent Electric Lamp 267. 05/21/81 08/30/81 09/19/82 264,657 Incandescent Electric Lamp 330. 02/28/82 08/07/82 09/19/82 264,658 Regulator for Dynamo-Electric Machines 331. 02/28/82 08/07/82 09/19/82 264,659 Regulator for Dynamo-Electric Machines 313. 12/05/81 08/07/82 09/19/82 264,660 Regulator for Dynamo-Electric Machines 323. 02/10/82 08/07/82 09/19/82 264,661 Regulator for Dynamo-Electric Machines 340. 05/01/82 08/07/82 09/19/82 264,662 Regulator for Dynamo-Electric Machines 341. 05/01/82 08/07/82 09/19/82 264,663 Regulator for Dynamo-Electric Machines 324. 02/10/82 08/07/82 09/19/82 264,664 Regulator for Dynamo-Electric Machines 342. 05/01/82 08/07/82 09/19/82 264,665 Regulator for Dynamo-Electric Machines 343. 05/01/82 08/07/82 09/19/82 264,666 Regulator for Dynamo-Electric Machines 348. 05/22/82 08/07/82 09/19/82 264,667 Regulator for Dynamo-Electric Machines 325. 02/10/82 08/07/82 09/19/82 264,668 Regulator for Dynamo-Electric Machines 326. 02/10/82 08/07/82 09/19/82 264,669 Regulator for Dynamo-Electric Machines 361. 06/09/82 08/07/82 09/19/82 264,670 Regulator for Dynamo-Electric Machines 327. 02/10/82 08/07/82 09/19/82 264,671 Regulator for Dynamo-Electric Machines 349. 05/22/82 08/07/82 09/19/82 264,672 Regulator for Dynamo-Electric Machines 303. 11/03/81 11/28/81 09/19/82 264,673 Regulator for Dynamo-Electric Machines 172. 01/28/80 02/05/80 10/03/82 265,311 Electric Lamp and Holder for the Same 290. 09/21/81 11/11/81 10/10/82 265,774 Method of Maintaining Temperature in Webermeters 305. 11/07/81 11/28/81 10/10/82 265,775 Electric-Arc Light 292. 09/27/81 11/11/81 10/10/82 265,776 Electric-Lighting System 225. 12/11/80 12/15/80 10/10/82 265,777 Method of Treating Carbons for Electric Lamps 186. 07/03/80 07/22/80 10/10/82 265,778 Electro-Magnetic Railway-Engine 321. 01/17/82 08/07/82 10/10/82 265,779 Regulator for Dynamo-Electric Machines 332. 02/28/82 08/07/82 10/10/82 265,780 Regulator for Dynamo-Electric Machines 333. 02/28/82 08/07/82 10/10/82 265,781 Regulator for Dynamo-Electric Machines 372. 07/07/82 08/14/82 10/10/82 265,782 Regulator for Dynamo-Electric Machines 373. 07/07/82 08/14/82 10/10/82 265,783 Regulator for Dynamo-Electric Machines 374. 07/07/82 08/14/82 10/10/82 265,784 Regulator for Dynamo-Electric Machines 375. 07/07/82 08/14/82 10/10/82 265,785 Dynamo-Electric Machine 350. 05/22/82 08/07/82 10/10/82 265,786 Apparatus for the Electrical Transmission of Power 288. 09/07/81 10/17/81 10/17/82 266,021 Telephone 167. 08/01/79 08/06/79 10/17/82 266,022 Telephone 251. 04/21/81 04/26/81 10/24/82 266,447 Electric Incandescent Lamp 309. 11/25/81 12/06/81 10/24/82 266,588 Vacuum Apparatus 301. 10/25/81 12/09/81 10/31/82 266,793 Electric Distribution System 339. 05/01/82 05/17/82 11/28/82 268,205 Dynamo or Magneto Electric Machine 395. 10/10/82 10/12/82 11/28/82 268,206 Incandescing Electric Lamp 385. 08/25/82 09/13/82 02/06/83 271,613 Manufacture of Incandescing Electric Lamps 403. 10/19/82 10/20/82 02/06/83 271,614 Shafting 408. 10/19/82 11/09/82 02/06/83 271,615 Governor for Dynamo-Electric Machines 400. 10/16/82 10/20/82 02/06/83 271,616 Regulator for Dynamo-Electric Machines 336. 03/30/82 10/06/82 02/13/83 272,034 Telephone 409. 10/26/82 11/09/82 03/06/83 273,485 Incandescing Electric Lamp 396. 10/12/82 10/20/82 03/06/83 273,486 Incandescing Electric Lamp 389. 09/12/82 09/22/82 03/06/83 273,487 Regulator for Dynamo-Electric Machines 344. 05/01/82 08/07/82 03/06/83 273,488 Regulator for Dynamo-Electric Machines 362. 06/09/82 08/07/82 03/06/83 273,489 Turn-Table for Electric Railways 363. 06/09/82 08/07/82 03/06/83 273,490 Electro-Magnetic Railway System 405. 10/19/82 10/26/82 03/06/83 273,491 Regulator for Driving Engines of Electrical Generators 347. 05/19/82 06/26/82 03/06/83 273,492 Secondary Battery 406. 10/19/82 10/26/82 03/06/83 273,493 Valve-Gear for Electrical Generator-Engines 376. 07/07/82 08/14/82 03/06/83 273,494 Electrical Railroad 381. 08/05/82 08/07/82 03/13/83 273,714 Magneto-Electric Signaling Apparatus 294. 10/04/81 08/07/82 03/13/83 273,715 Art of Malleableizing Iron 351. 05/22/82 08/07/82 03/13/83 273,828 System of Underground Conductors for Electrical Distribution 419. 11/20/82 11/27/82 03/20/83 274,290 System of Electrical Distribution 420. 11/28/82 12/08/82 03/20/83 274,291 Mold for Carbonizing 353. 06/03/82 08/07/82 03/20/83 274,292 Secondary Battery 397. 10/14/82 10/20/82 03/20/83 274,293 Electric Lamp 415. 11/13/82 11/23/82 03/20/83 274,294 Incandescing Electric Lamp 417. 11/14/82 11/23/82 03/20/83 274,295 Incandescent Electric Lamp 370. 07/05/82 08/14/82 03/20/83 274,296 Manufacture of Incandescents 337. 03/30/82 10/06/82 03/27/83 274,576 Transmitting-Telephone 338. 03/30/82 10/06/82 03/27/83 274,577 Telephone 398. 10/14/82 10/20/82 04/10/83 275,612 Manufacture of Incandescing Electric Lamps 328. 02/10/82 08/07/82 04/10/83 275,613 Incandescing Electric Lamp 426. 12/20/82 01/08/83 04/24/83 276,232 Means for Operating and Regulating Electrical Generators 418. 11/14/82 11/23/82 04/24/83 276,233 Electrical Generator and Motor 433. 02/13/83 03/16/83 05/29/83 13,940 Design for Incandescing Electric Lamp 421. 11/28/82 12/08/82 05/29/83 278,413 Regulator for Dynamo-Electric Machines 422. 11/28/82 12/08/82 05/29/83 278,414 Regulator for Dynamo-Electric Machines 427. 01/13/83 01/22/83 05/29/83 278,415 Manufacture of Incandescing Electric Lamps 334. 02/28/82 08/07/82 05/29/83 278,416 Manufacture of Incandescing Electric Lamps 428. 01/13/83 01/22/83 05/29/83 278,417 Manufacture of Incandescing Electric Lamps 377. 07/07/82 08/14/82 05/29/83 278,418 Apparatus for Translating Electric Currents From High to Low Tension 320. 12/15/81 08/07/82 05/29/83 278,419 Dynamo-Electric Machine 434. 02/13/83 03/16/83 07/03/83 280,727 System of Electrical Distribution 429. 01/13/83 01/22/83 07/17/83 281,349 Regulator for Dynamo-Electric Machines 416. 11/13/82 11/23/82 07/17/83 281,350 Regulator for Dynamo-Electric Machines 441. 03/05/83 03/16/83 07/17/83 281,351 Electrical Generator 295. 10/05/81 11/11/81 07/17/83 281,352 Webermeter 357. 06/03/82 09/13/82 07/17/83 281,353 Dynamo or Magneto Electric Machine 382. 08/05/82 08/07/82 07/31/83 282,287 Magneto-Electric Signaling Apparatus 444. 04/05/83 04/17/83 08/28/83 283,983 System of Electrical Distribution 442. 03/05/83 03/16/83 08/28/83 283,984 System of Electrical Distribution 430. 01/13/83 01/22/83 08/28/83 283,985 System of Electrical Distribution 431. 01/13/83 01/22/83 08/28/83 283,986 System of Electrical Distribution 460. 06/25/83 06/29/83 10/30/83 287,511 Electric Regulator 461. 06/25/83 06/29/83 10/30/83 287,512 Dynamo-Electric Machine 462. 06/25/83 06/29/83 10/30/83 287,513 Dynamo-Electric Machine 463. 06/25/83 06/29/83 10/30/83 287,514 Dynamo-Electric Machine 464. 06/25/83 06/29/83 10/30/83 287,515 System of Electrical Distribution 449. 05/08/83 05/14/83 10/30/83 287,516 System of Electrical Distribution 443. 03/14/83 03/16/83 10/30/83 287,517 System of Electrical Distribution 386. 08/25/82 09/13/82 10/30/83 287,518 Method of Manufacturing Incandescing Electric Lamps 423. 11/28/82 12/08/82 10/30/83 287,519 Incandescing Electric Lamp 412. 11/03/82 11/09/82 10/30/83 287,520 Incandescing Conductor for Electric Lamps 436. 02/17/83 03/16/83 10/30/83 287,521 Dynamo or Magneto Electric Machine 437. 02/17/83 03/16/83 10/30/83 287,522 Mold for Carbonizing 358. 06/03/82 09/13/82 10/30/83 287,523 Dynamo or Magneto Electric Machine 424. 11/28/82 12/08/82 10/30/83 287,524 Regulator for Dynamo-Electric Machines 392. 10/04/82 10/20/82 10/30/83 287,525 Regulator for Systems of Electrical Distribution 297. 10/17/81 11/11/81 11/13/83 288,318 Regulator for Dynamo or Magneto Electric Machines go to page 2 Program Description | Enhanced Transcript | Reference The Film & More | Special Features | Timeline | Gallery | Teacher's Guide The American Experience | Kids | Feedback | Search | Shop | Subscribe ©  New content 1999-2000 PBS Online / WGBH