Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10066752 | Explosion-proof valve | Daniel Zellweger, Pascal Oberlin | 2018-09-04 |
| 9528612 | Explosion-proof sliding gate valve for blocking a fluid flow in a pipeline | Daniel Zellweger, Roland Hafner | 2016-12-27 |