Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972466 | Digital composite tone alerting | David L. Lynch | 1990-11-20 |
| 4875045 | Variable gain encoder apparatus and method | David L. Lynch | 1989-10-17 |
| 4429646 | Method and apparatus for burning damp oil-shales of low heating power | — | 1984-02-07 |