Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5615271 | Method and apparatus for activating switches in response to different acoustic signals | Carlile R. Stevens | 1997-03-25 |
| 5493618 | Method and apparatus for activating switches in response to different acoustic signals | Carlile R. Stevens | 1996-02-20 |