Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8854923 | Variable resonance acoustic transducer | — | 2014-10-07 |
| 6068612 | Air detector | George A. Bowman, Joseph B. Matthews | 2000-05-30 |
| 5843035 | Air detector for intravenous infusion system | George A. Bowman, Joseph B. Matthews | 1998-12-01 |
| 5333190 | Telephone ring detection method and apparatus | — | 1994-07-26 |