| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Austria | 1 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Basic communication technologies | |
| #3 | Electrical machinery and energy | |
| #4 | Telecommunications | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Amplifiers | |
| #3 | Special information storage | |
| #4 | Unspecified technologies | |
| #5 | Lighting device details | |
| #6 | Transmission |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lincoln Thompson | 3 |
| #2 | Garrigus Clarence G | 2 |
| #3 | Bristol Franklin B | 1 |
| #4 | Thompson Lincoln | 1 |
| #5 | Pinkler Arthur P | 1 |
| #6 | Bristol William H | 1 |
| #7 | Griggs Henry L | 1 |
| #8 | Corporation Wm H Bristol Talki | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1787290A | Electromagnetic pick-up device for phonographic records | |
| US1815559A | Vibration eliminator for phonograph turntables | |
| US1782990A | Speed-control apparatus | |
| US1755938A | Amplification system | |
| US1760672A | Combined microphonic transmitter and amplifier therefor | |
| US1809578A | Cone type loud speaker | |
| US1751356A | Diaphragm | |
| US1753986A | Combined electrical phonograph and radiocarinet | |
| CA303590A | Amplification system |