Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4429713 | Snap closure coupling for flowing-media ducts | — | 1984-02-07 |
| 4394874 | Valve construction for quick-closure coupling | — | 1983-07-26 |
| 4200121 | Quick-closure coupling for hydraulic lines | Ludwig Portele | 1980-04-29 |