Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882586 | Analog-to-digital converter | Darrel A. Dolph, Leonard W. Demski, Jean-Marie Loisel | 1989-11-21 |
| 4826592 | Magnetic filter apparatus | — | 1989-05-02 |
| 4825385 | Speech processor method and apparatus | Darrel A. Dolph, Leonard W. Demski, Arthur R. McKendry | 1989-04-25 |