Telegraphy and Telephony Patents

The following list contains the 186 patents Edison received concerning telegraphy and telephony. It is arranged in chronological order by execution date, which is the date on which Edison signed the application and the date in the patenting process that comes closest to the time of actual inventive activity. The application date is the date on which the Patent Office received and recorded the application; the issue date, the time at which the patent, having passed inspection and any legal challenges, was awarded.

Batteries • Cement • Electric Light & Power • Mining & Ore Milling
Miscellany • Motion Pictures • Phonographs & Sound Recording • Telegraphy & Telephony

No.	Executed	Applied	Issued	PatentNo.	Title
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)
8.	05/24/70	05/27/70	07/02/72	128,608	Printing-Telegraph Instruments (with Franklin L. Pope)
9.	06/22/70	06/28/70	05/09/71	114,656	Telegraphic Transmitting Instruments
10.	06/22/70	06/28/70	05/09/71	114,658	Electro-Magnets for Telegraph Instruments
11.	06/29/70	07/06/70	01/24/71	111,112	Governors for Electro-Motors
12.	09/06/70	09/21/70	05/09/71	114,657	Relay-Magnets for Telegraph Instruments
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
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
19.	08/16/71	08/18/71	12/05/71	121,601	Machinery for Perforating Paper for Telegraph Purposes
20.	11/13/71	11/18/71	05/07/72	126,535	Printing-Telegraphs
22.	01/03/72	01/12/72	05/07/72	126,532	Printing-Telegraphs
23.	01/17/72	01/24/72	05/07/72	126,531	Printing-Telegraphs
24.	01/17/72	01/24/72	05/07/72	126,534	Printing-Telegraphs
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
28.	02/14/72	02/19/72	05/07/72	126,533	Printing-Telegraphs
29.	03/15/72	03/22/72	10/22/72	132,456	Apparatus for Perforating Paper for Telegraphic Use
30.	04/10/72	04/16/72	10/22/72	132,455	Paper for Chemical Telegraphs etc.
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
37.	05/06/72	06/06/72	09/17/72	131,334	Rheotomes or Circuit-Directors
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
40.	05/09/72	06/06/72	08/27/72	130,795	Electro-Magnets
41.	05/09/72	06/06/72	09/17/72	131,342	Printing-Telegraph Instruments
42.	05/28/72	06/06/72	09/17/72	131,341	Printing-Telegraph Instruments
43.	06/10/72	07/09/72	09/17/72	131,337	Printing-Telegraphs
44.	06/10/72	07/09/72	09/17/72	131,340	Printing-Telegraphs
45.	06/10/72	07/09/72	09/17/72	131,343	Transmitters and Circuits for Printing-Telegraphs
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
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
50.	06/29/72	07/09/72	09/17/72	131,344	Unison-Stops for Printing-Telegraphs
51.	10/16/72	10/22/72	01/14/73	134,866	Printing-Telegraph Instruments
52.	10/16/72	10/22/72	05/13/73	138,869	Printing-Telegraphs
53.	10/31/72	11/05/72	09/23/73	142,999	Galvanic Batteries
54.	11/05/72	11/09/72	08/12/73	141,772	Circuits for Automatic or Chemical Telegraphs
55.	11/09/72	11/11/72	02/04/73	135,531	Circuits for Chemical Telegraphs
56.	11/26/72	12/03/72	01/27/74	146,812	Telegraph-Signal Boxes
57.	12/12/72	01/15/73	08/12/73	141,773	Circuits for Automatic Telegraphs
58.	12/12/72	01/15/73	08/12/73	141,776	Circuits for Automatic Telegraphs
59.	12/12/72	01/15/73	05/12/74	150,848	Chemical or Automatic 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
63.	02/13/73	02/18/73	07/01/73	140,489	Circuits for Printing-Telegraphs
64.	03/07/73	03/13/73	05/13/73	138,870	Printing-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
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
69.	03/07/73	03/13/73	11/17/74	156,843	Duplex Chemical Telegraphs
70.	03/24/73	07/29/73	02/10/74	147,312	Perforators for Automatic Telegraphy
71.	03/24/73	07/29/73	02/10/74	147,314	Circuits for Chemical Telegraphs
72.	03/24/73	07/29/73	05/12/74	150,847	Receiving Instruments for Chemical Telegraphs
73.	04/22/73	04/26/73	04/27/75	162,633	Duplex Telegraphs
74.	04/23/73	05/16/73	07/01/73	140,488	Printing-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
77.	04/23/73	07/29/73	02/10/74	147,311	Electric Telegraphs
78.	04/23/73	07/29/73	02/10/74	147,313	Chemical Telegraphs
79.	04/23/73	07/29/73	03/02/75	160,405	Adjustable Electro-Magnets for Relays, etc.
80.	08/25/73	09/02/73	05/26/74	151,209	Automatic Telegraphy and Perforators Therefor
81.	09/29/73	06/01/74	03/02/75	160,402	Solutions for Chemical Telegraph-Paper
82.	09/29/73	06/01/74	03/02/75	160,404	Solutions for Chemical Telegraph-Paper
83.	10/14/73	06/01/74	03/09/75	160,580	Solutions for Chemical Telegraph-Paper
84.	10/29/73	06/01/74	03/02/75	160,403	Solutions for Chemical Telegraph-Paper
85.	04/02/74	05/11/74	09/08/74	154,788	District Telegraph Signal-Boxes
86.	05/22/74	06/01/74	09/21/75	168,004	Printing-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
90.	08/07/74	08/13/74	01/19/75	158,787	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
93.	08/14/74	01/15/75	10/05/75	168,465	Solutions for Chemical Telegraphs
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
97.	08/19/74	09/01/74	08/08/76	180,858	Duplex Telegraphs
98.	08/19/74	09/01/74	09/03/78	207,723	Duplex Telegraphs
99.	08/19/74	09/01/74	08/09/92	480,567	Duplex Telegraph
100.	12/14/74	12/28/74	09/03/78	207,724	Duplex 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
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
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
108.	02/11/75	02/16/75	12/21/75	171,273	Telegraph Apparatus
109.	02/24/75	03/23/75	11/16/75	169,972	Electric-Signalling Instruments
110.	02/24/75	03/23/75	10/22/78	209,241	Quadruplex-Telegraph Repeaters
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
114.	05/09/76	05/16/76	10/10/76	182,996	Acoustic Telegraphs
115.	05/09/76	05/16/76	01/16/77	186,330	Acoustic Electric Telegraphs
116.	05/09/76	05/16/76	12/11/77	198,087	Telephonic Telegraphs
117.	05/09/76	05/18/76	01/23/77	186,548	Telegraphic Alarm and Signal Apparatus
118.	08/16/76	08/31/76	12/19/76	185,507	Electro-Harmonic Multiplex Telegraphs
119.	08/26/76	09/18/76	03/05/78	200,993	Acoustic Telegraphs
120.	08/26/76	09/30/76	12/07/80	235,142	Acoustic Telegraph
121.	10/30/76	11/01/76	02/05/78	200,032	Synchronous Movements for Electric Telegraphs
122.	10/30/76	11/11/76	03/05/78	200,994	Automatic-Telegraph Perforator and Transmitter
123.	02/03/77	03/26/77	03/25/79	213,554	Automatic Telegraphs
127.	04/18/77	04/27/77	05/03/92	474,230	Speaking-Telegraph
129.	05/08/77	05/14/77	07/22/79	217,781	Sextuplex Telegraphs
130.	05/08/77	05/14/77	02/07/88	377,374	Telegraphy
131.	05/31/77	06/02/77	05/26/91	452,913	Sextuplex Telegraph
132.	05/31/77	06/02/77	06/02/91	453,601	Sextuplex Telegraph
133.	05/31/77	06/02/77	01/16/94	512,872	Sextuplex Telegraph
134.	07/09/77	07/20/77	05/03/92	474,231	Speaking-Telegraph
135.	07/16/77	07/20/77	04/30/78	203,014	Speaking-Telegraphs
136.	07/16/77	07/20/77	09/24/78	208,299	Speaking-Telephones
137.	08/16/77	08/22/77	02/04/90	420,594	Quadruplex Telegraph
138.	08/16/77	08/28/77	04/30/78	203,015	Speaking-Telegraphs
139.	08/31/77	09/05/77	03/07/93	492,789	Speaking-Telegraph
140.	12/08/77	12/13/77	04/30/78	203,013	Speaking-Telegraphs
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
145.	02/28/78	03/04/78	04/30/78	203,017	Telephone Call-Signal
146.	02/28/78	03/07/78	04/30/78	203,016	Speaking-Telephones
149.	11/08/78	11/11/78	12/09/79	222,390	Carbon-Telephones
150.	11/11/78	11/14/78	07/22/79	217,782	Duplex Telegraphs
162.	03/24/79	03/31/79	11/25/79	221,957	Telephones
166.	07/17/79	07/25/79	08/31/80	231,704	Electro-Chemical Receiving-Telephone
167.	08/01/79	08/06/79	10/17/82	266,022	Telephone
168.	08/04/79	08/06/79	01/17/82	252,442	Telephone
192.	07/29/80	08/09/80	08/19/90	434,585	Telegraph-Relay
213.	10/21/80	11/11/80	02/22/81	238,098	Magneto Signal Apparatus
222.	12/11/80	12/14/80	03/22/81	239,154	Relay for Telegraphs
280.	07/26/81	12/06/81	07/19/92	479,184	Fac-simile Telegraph
287.	09/07/81	10/17/81	05/09/82	257,677	Telephone
288.	09/07/81	10/17/81	10/17/82	266,021	Telephone
336.	03/30/82	10/06/82	02/13/83	272,034	Telephone
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
483.	11/10/83	11/13/83	03/02/86	337,254	Telephone
497.	02/09/84	03/19/84	03/17/85	314,115	Chemical Stock Quotation Telegraph
507.	09/24/84	12/15/84	10/14/90	438,304	Electric Signaling Apparatus
508.	10/21/84	12/01/84	03/04/90	422,577	Apparatus for Speaking-Telephones
509.	12/03/84	12/15/84	10/27/85	329,030	Telephone
510.	12/09/84	12/15/84	04/27/86	340,707	Telephonic Repeater
511.	12/09/84	12/15/84	03/04/90	422,578	Telephonic Repeater
512.	12/09/84	12/15/84	03/04/90	422,579	Telephonic Repeater
513.	12/19/84	01/12/85	04/27/86	340,708	Electrical Signaling Apparatus
514.	12/19/84	01/12/85	08/10/86	347,097	Electrical Signaling Apparatus
515.	12/31/84	10/14/85	07/12/92	478,743	Telephone-Repeater
516.	01/02/85	10/14/85	04/27/86	340,709	Telephone-Circuit
517.	01/09/85	10/14/85	02/14/88	378,044	Telephone-Transmitter
518.	01/12/85	10/14/85	08/24/86	348,114	Electrode for Telephone-Transmitters
520.	03/27/85	04/07/85	10/05/86	350,234	System of Railway Signaling
521.	03/27/85	04/07/85	11/22/92	486,634	System of Railway Signaling
522.	04/27/85	05/08/85	12/29/85	333,289	Telegraphy
523.	04/30/85	05/08/85	12/29/85	333,290	Duplex Telegraphy
524.	05/06/85	05/16/85	12/29/85	333,291	Way-Station Quadruplex Telegraphy
525.	05/14/85	05/23/85	12/29/91	465,971	Means for Transmitting Signals Electrically
526.	10/07/85	10/23/85	02/25/90	422,072	Telegraphy
527.	10/07/85	10/23/85	09/30/90	437,422	Telegraphy
528.	11/12/85	11/24/85	02/25/90	422,073	Telegraphy
529.	11/24/85	02/19/86	02/25/90	422,074	Telegraphy
530.	11/30/85	02/19/86	09/02/90	435,689	Telegraphy
531.	12/22/85	02/19/86	10/14/90	438,306	Telephone
532.	12/28/85	01/13/86	10/05/86	350,235	Railway-Telegraphy
533.	01/28/86	02/19/86	07/09/89	406,567	Telephone
534.	02/17/86	02/18/86	05/03/92	474,232	Speaking-Telegraph
535.	05/11/86	05/15/86	09/20/87	370,132	Telegraphy
538.	07/15/86	07/19/86	03/24/91	448,779	Telegraph
550.	11/24/86	11/29/86	06/19/88	384,830	Railway Signaling
875.	09/14/05	09/15/05	12/19/11	1,012,250	Recording-Telephone
918.	06/18/07	06/20/07	01/19/09	909,877	Telegraphy
1042.	10/23/18	10/26/18	08/08/22	1,425,183	Transmitter