Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6386200 | Bi-functional in-line phonation valve | John Zowtiak, John O'Mahony | 2002-05-14 |
| 6189534 | Bi-functional in-line phonation valve | John Zowtiak, John O'Mahony | 2001-02-20 |
| 5460176 | Positive locking cannula | — | 1995-10-24 |
| 5390669 | Device using connector tube to lock inner cannula inside outer cannula | J. Michael Stuart | 1995-02-21 |