Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4913300 | Closure with guarantee ring for containers | Ernst Wiedmer | 1990-04-03 |
| 4540102 | Resilient material screw top for containers | — | 1985-09-10 |
| 4530436 | Screw cap with guarantee strip for container | — | 1985-07-23 |
| 4355730 | Screw cap with a guarantee ring for indicating the first opening of a container | — | 1982-10-26 |