Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259378 | Phonation device for tracheotomy patients including a check valve and filtering means | Philippe Vannson | 1993-11-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259378 | Phonation device for tracheotomy patients including a check valve and filtering means | Philippe Vannson | 1993-11-09 |