Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4604853 | Method and apparatus for sealing a container with a tamper-evident closure | Darwin L. Ellis | 1986-08-12 |
| 4567993 | Tamper-evident closure | W. Cox Willis | 1986-02-04 |
| 4378894 | Tamper-evident closure | W. Coy Willis | 1983-04-05 |
| 4227617 | Container closure | W. Coy Willis | 1980-10-14 |