| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | Denmark | 3 | |
| #3 | Switzerland | 2 | |
| #4 | Austria | 1 | |
| #5 | Germany | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Basic communication technologies | |
| #3 | Medical technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Amplification control | |
| #3 | Diagnosis and surgery |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blackledge Vernon O | 6 |
| #2 | Stearns William P | 3 |
| #3 | Rohrer John S | 2 |
| #4 | Lauchner J K | 2 |
| #5 | Stearns W P | 2 |
| #6 | Blackledge Vernon Oscar | 1 |
| #7 | Elpern Barry S | 1 |
| #8 | Lauchner John K | 1 |
| #9 | Baanon Oo Buratsukuritsuji | 1 |
| #10 | Blackledge V O | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4025723A | Real time amplitude control of electrical waves | |
| CA984460A | Apparatus and prosthetic device for providing electronic correction of auditory deficiencies in aurally handicapped persons |