Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4559862 | Packing material | Chester S. Hopper | 1985-12-24 |
| 4431698 | Waterproof packing | Chester S. Hopper | 1984-02-14 |
| 4371180 | Gasket material | Chester S. Hopper | 1983-02-01 |
| 4298207 | Resilient gasket material | Chester S. Hopper | 1981-11-03 |