Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5619564 | Tone detector with improved performance in the presence of speech | Ronald J. Canniff | 1997-04-08 |
| 4536703 | Method and apparatus for testing cable wire connected to terminals at a remote location | Alexander M. Mitchell | 1985-08-20 |
| 4524321 | Method and apparatus for testing cable wire connected to terminals at a remote location | Alexander M. Mitchell | 1985-06-18 |