Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4567475 | Gas or vapor alarm system including scanning gas sensors | Gustav Pfister, Alfons Reis, Alan Troup, Hans-Peter Ulli | 1986-01-28 |
| 4446718 | Method and apparatus for reducing false alarms in gas warning installations caused by spurious gases | Karlheinz Paglotke | 1984-05-08 |