Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6595234 | Auto-drain unit | David Sellick | 2003-07-22 |
| 5846066 | Vacuum pumps with claw-type rotor and roots-type rotor near the outlet | — | 1998-12-08 |
| 4567475 | Gas or vapor alarm system including scanning gas sensors | Stanislaw Bukowiecki, Gustav Pfister, Alfons Reis, Hans-Peter Ulli | 1986-01-28 |
| 4551710 | Method and apparatus for reporting dangerous conditions | Hannes Guttinger, Gustav Pfister | 1985-11-05 |
| 4543815 | Device for the detection of foreign components in a gas and an application of the device | Sigfrid Strassler, Hannes Guttinger, Gustav Pfister | 1985-10-01 |