Patent Date Title Inventor Assignee
161739April 6, 1875IMPROVEMENT IN TRANSMITTERS AND RECEIVERS FOR ELECTRIC TELEGRAPHSBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
174465March 7, 1876ALEXANDER GRAHAM BELL, OP SALEM, MASSACHUSETTS. IMPROVEMENT IN TELEGRAPHY.ALEXANDER GRAHAM BELL, OP MASSACHUSETTS. IMPROVEMENT IN TELEGRAPHY.BELL ALEXANDER GRAHAM
178399June 6, 1876IMPROVEMENT IN TELEPHONIC TELEGRAPH-RECEIVERSBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
181553August 29, 1876IMPROVEMENT IN GENERATING ELECTRIC CURRENTSBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
186787January 30, 1877IMPROVEMENT IN ELECTRIC TELEGRAPHYBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
201488March 19, 1878IMPROVEMENT IN SPEAKING-TELEPHONESBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
213090March 11, 1879IMPROVEMENT IN ELECTRIC SPEAKING-TELEPHONESBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
220791October 21, 1879IMPROVEMENT IN TELEPHONE-CIRCUITSBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
228507June 8, 1880ELECTRIC TELEPHONE TRANSMITTERBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
230168July 20, 1880AUTOMATIC SHORT-CIRCUITER FOR TELEPHONESBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
238833March 15, 1881ELECTRIC CALL-BELLBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
241184May 10, 1881TELEPHONIC RECEIVERBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
244426July 19, 1881TELEPHONE-CIRCUITBELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM
757012April 12, 1904AERIAL VEHICLE.BELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM, United States of America (US)
856838June 11, 1907CONNECTION DEVICE FOR THE FRAMES OF AERIAL VEHICLES AND OTHER STRUCTURES.BELL ALEXANDER GRAHAM - ; MCNEIL HECTOR P -BELL ALEXANDER GRAHAM, United States of America (US)
MCNEIL HECTOR P, United States of America (US)
1050601January 14, 1913FLYING-MACHINE.BELL ALEXANDER GRAHAM -BELL ALEXANDER GRAHAM, United States of America (US)