Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6157728 | Universal self-attaching inductive coupling unit for connecting hearing instrument to peripheral electronic devices | Joseph Sylvester Chang | 2000-12-05 |
| 5631965 | Hearing protector | Joseph Sylvester Chang | 1997-05-20 |
| 5182521 | Time-multiplexed switched capacitor circuit having reduced capacitance | Joseph Sylvester Chang | 1993-01-26 |
| 4515158 | Speech processing method and apparatus | James F. Patrick, Peter Seligman, Graeme Clark | 1985-05-07 |
| 4441202 | Speech processor | Peter Seligman, Graeme Clark, James F. Patrick, John B. Millar | 1984-04-03 |
| 4267410 | Prosthesis | Ian C. Forster, James F. Patrick, Raymond C. Black, Graeme Clark | 1981-05-12 |