| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 4 | |
| #2 | United States | 4 | |
| #3 | Canada | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | WIPO (World Intellectual Property Organization) | 2 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | India | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Basic communication technologies | |
| #3 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Stereophonic systems | |
| #2 | Amplification control | |
| #3 | Electrically-conductive connections |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blackmer David E | 12 |
| #2 | Townsend James H Jr | 6 |
| #3 | Townsend Jr James H | 3 |
| #4 | Blackmer D | 1 |
| #5 | Wagaman James P | 1 |
| #6 | Townsend James H | 1 |
| #7 | Porter Gordon A | 1 |
| #8 | Blackmer D E | 1 |
| #9 | Blackkmer David Eastman | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU4622489A | Pressure compensating connector assembly | |
| US4680796A | Sound encoding system | |
| US4706287A | Stereo generator | |
| US4589129A | Signal decoding system | |
| US4404427A | Audio signal processing system |