| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carlson Elmer V | 8 |
| #2 | Killion Mead C | 4 |
| #3 | Cross Floyd W | 3 |
| #4 | Jr August Frank Mostardo | 1 |
| #5 | Carlson Elmer Victor | 1 |
| #6 | Knowles Hugh S | 1 |
| #7 | Mostardo August F Jr | 1 |
| #8 | Mullen Joseph E | 1 |
| #9 | Burkhard Mahlon D | 1 |
| #10 | Cross Floyd Warren | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA865866A | Transducer | |
| CA804196A | Transducer | |
| CA637988A | Electro-acoustic transducer | |
| CA881738A | Electronic appliance | |
| CA807302A | Transducer | |
| CA764614A | Electromechanical transducer | |
| CA690572A | Electro-mechanical transducer | |
| CA807303A | Transducer | |
| CA866383A | Audio frequency amplification circuit | |
| CA765105A | Transducer and method of making |