List of United States patents granted to Thomas A. Edison, arranged
according to dates of execution of applications for such patents. This
list shows the inventions as Mr. Edison has worked upon them from year
to year

1868

NO. TITLE OF PATENT DATE EXECUTED DATE EXECUTED
90,646, Electrographic Vote Recorder . . . . .Oct. 13, 1868

1869

91,527 Printing Telegraph (reissued October
25, 1870, numbered 4166, and August
5, 1873, numbered 5519). . . . . . . .Jan. 25, 1869
96,567 Apparatus for Printing Telegraph (reissued
February 1, 1870, numbered
3820). . . . . . . . . . . . . . . . .Aug. 17, 1869
96,681 Electrical Switch for Telegraph Apparatus Aug. 27, 1869
102,320 Printing Telegraph—Pope and Edison
(reissued April 17, 1877, numbered
7621, and December 9, 1884, numbered
10,542). . . . . . . . . . . . . . . Sept. 16, 1869
103,924 Printing Telegraphs—Pope and Edison
(reissued August 5, 1873)

1870

103,035 Electromotor Escapement. . . . . . . . Feb. 5, 1870
128,608 Printing Telegraph Instruments . . . . .May 4, 1870
114,656 Telegraph Transmitting Instruments . .June 22, 1870
114,658 Electro Magnets for Telegraph
Instruments. . . . . . . . . . . . . .June 22, 1870
114,657 Relay Magnets for Telegraph
Instruments. . . . . . . . . . . . . .Sept. 6, 1870
111,112 Electric Motor Governors . . . . . . .June 29, 1870
113,033 Printing Telegraph Apparatus . . . . .Nov. 17, 1870

1871

113,034 Printing Telegraph Apparatus . . . . .Jan. 10, 1871
123,005 Telegraph Apparatus. . . . . . . . . .July 26, 1871
123,006 Printing Telegraph . . . . . . . . . .July 26, 1871
123,984 Telegraph Apparatus. . . . . . . . . .July 26, 1871
124,800 Telegraphic Recording Instruments. . .Aug. 12, 1871
121,601 Machinery for Perforating Paper for
Telegraph Purposes . . . . . . . . . .Aug. 16, 1871
126,535 Printing Telegraphs. . . . . . . . . .Nov. 13, 1871
133,841 Typewriting Machine. . . . . . . . . .Nov. 13, 1871

1872
126,532 Printing Telegraphs. . . . . . . . . . .Jan. 3 1872
126,531 Printing Telegraphs. . . . . . . . . .Jan. 17, 1872
126,534 Printing Telegraphs. . . . . . . . . .Jan. 17, 1872
126,528 Type Wheels for Printing Telegraphs. .Jan. 23, 1872
126,529 Type Wheels for Printing Telegraphs. .Jan. 23, 1872
126,530 Printing Telegraphs. . . . . . . . . .Feb. 14, 1872
126,533 Printing Telegraphs. . . . . . . . . .Feb. 14, 1872
132,456 Apparatus for Perforating Paper for
Telegraphic Use. . . . . . . . . . . March 15, 1872
132,455 Improvement in Paper for Chemical
Telegraphs . . . . . . . . . . . . . April 10, 1872
133,019 Electrical Printing Machine. . . . . April 18, 1872
128,131 Printing Telegraphs. . . . . . . . . April 26, 1872
128,604 Printing Telegraphs. . . . . . . . . April 26, 1872
128,605 Printing Telegraphs. . . . . . . . . April 26, 1872
128,606 Printing Telegraphs. . . . . . . . . April 26, 1872
128,607 Printing Telegraphs. . . . . . . . . April 26, 1872
131,334 Rheotomes or Circuit Directors . . . . .May 6, 1872
134,867 Automatic Telegraph Instruments. . . . .May 8, 1872
134,868 Electro Magnetic Adjusters . . . . . . .May 8, 1872
130,795 Electro Magnets. . . . . . . . . . . . .May 9, 1872
131,342 Printing Telegraphs. . . . . . . . . . .May 9, 1872
131,341 Printing Telegraphs. . . . . . . . . . May 28, 1872
131,337 Printing Telegraphs. . . . . . . . . .June 10, 1872
131,340 Printing Telegraphs. . . . . . . . . .June 10, 1872
131,343 Transmitters and Circuits for Printing
Telegraph. . . . . . . . . . . . . . .June 10, 1872
131,335 Printing Telegraphs. . . . . . . . . .June 15, 1872
131,336 Printing Telegraphs. . . . . . . . . .June 15, 1872
131,338 Printing Telegraphs. . . . . . . . . .June 29, 1872
131,339 Printing Telegraphs. . . . . . . . . .June 29, 1872
131,344 Unison Stops for Printing Telegraphs .June 29, 1872
134,866 Printing and Telegraph Instruments . .Oct. 16, 1872
138,869 Printing Telegraphs. . . . . . . . . .Oct. 16, 1872
142,999 Galvanic Batteries . . . . . . . . . .Oct. 31, 1872
141,772 Automatic or Chemical Telegraphs . . . Nov. 5, 1872
135,531 Circuits for Chemical Telegraphs . . . Nov. 9, 1872
146,812 Telegraph Signal Boxes . . . . . . . .Nov. 26, 1872
141,773 Circuits for Automatic Telegraphs. . .Dec. 12, 1872
141,776 Circuits for Automatic Telegraphs. . .Dec. 12, 1872
150,848 Chemical or Automatic Telegraphs . . .Dec. 12, 1872

1873

139,128 Printing Telegraphs. . . . . . . . . .Jan. 21, 1873
139,129 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873
140,487 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873
140,489 Printing Telegraphs. . . . . . . . . .Feb. 13, 1873
138,870 Printing Telegraphs. . . . . . . . . .March 7, 1873
141,774 Chemical Telegraphs. . . . . . . . . .March 7, 1873
141,775 Perforator for Automatic Telegraphs. .March 7, 1873
141,777 Relay Magnets. . . . . . . . . . . . .March 7, 1873
142,688 Electric Regulators for Transmitting
Instruments . . . . . . . . . . . . . .March 7, 1873
156,843 Duplex Chemical Telegraphs . . . . . .March 7, 1873
147,312 Perforators for Automatic Telegraphy March 24, 1873
147,314 Circuits for Chemical Telegraphs . . March 24, 1873
150,847 Receiving Instruments for Chemical
Telegraphs . . . . . . . . . . . . . March 24, 1873
140,488 Printing Telegraphs. . . . . . . . . April 23, 1873
147,311 Electric Telegraphs. . . . . . . . . April 23, 1873
147,313 Chemical Telegraphs. . . . . . . . . April 23, 1873
147,917 Duplex Telegraphs. . . . . . . . . . April 23, 1873
150,846 Telegraph Relays . . . . . . . . . . April 23, 1873
160,405 Adjustable Electro Magnets for
Relays, etc. . . . . . . . . . . . . April 23, 1873
162,633 Duplex Telegraphs. . . . . . . . . . April 22, 1873
151,209 Automatic Telegraphy and Perforators
Therefor . . . . . . . . . . . . . . .Aug. 25, 1873
160,402 Solutions for Chemical Telegraph PaperSept. 29, 1873
160,404 Solutions for Chemical Telegraph PaperSept. 29, 1873
160,580 Solutions for Chemical Telegraph PaperOct. 14, 1873
160,403 Solutions for Chemical Telegraph PaperOct. 29, 1873

1874

154,788 District Telegraph Signal Box. . . . .April 2, 1874
168,004 Printing Telegraph . . . . . . . . . . May 22, 1874
166,859 Chemical Telegraphy. . . . . . . . . . June 1, 1874
166,860 Chemical Telegraphy. . . . . . . . . . June 1, 1874
166,861 Chemical Telegraphy. . . . . . . . . . June 1, 1874
158,787 Telegraph Apparatus. . . . . . . . . . Aug. 7, 1874
172,305 Automatic Roman Character
Telegraph. . . . . . . . . . . . . . . Aug. 7, 1874
173,718 Automatic Telegraphy . . . . . . . . . Aug. 7, 1874
178,221 Duplex Telegraphs. . . . . . . . Aug. 19, 1874
178,222 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874
178,223 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874
180,858 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874
207,723 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874
480,567 Duplex Telegraphs. . . . . . . . . . .Aug. 19, 1874
207,724 Duplex Telegraphs. . . . . . . . . . .Dec. 14, 1874