Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4576278 | Purge trap tray | Thomas A. Hessen, Thomas R. Hardy, Allie F. Gilvin | 1986-03-18 |
| 4552600 | Method and apparatus for manufacturing a purge trap tray | Thomas A. Hessen, Thomas R. Hardy, Allie F. Gilvin | 1985-11-12 |