Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796467 | Testing device for respiratory protective devices | John F. Burt, Jeffrey M. Whynall, Gilbert L. Knott, Tavin Harnvorakiat | 1989-01-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796467 | Testing device for respiratory protective devices | John F. Burt, Jeffrey M. Whynall, Gilbert L. Knott, Tavin Harnvorakiat | 1989-01-10 |