Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6890376 | Gas purification system with an integrated hydrogen sorption and filter assembly | Pierre J. Arquin, Nels W. Lindahl | 2005-05-10 |
| 6733571 | Gas purification system with an integrated hydrogen sorption and filter assembly | Pierre J. Arquin, Nels W. Lindahl | 2004-05-11 |
| 4909271 | Ultrahigh purity gas valve with encapsulated bellows | Joseph H. Nichols, Charles M. Obermeyer, Ronald G. Hendry | 1990-03-20 |
| D299950 | Combined seal-off valve body and cap | Joseph H. Nichols | 1989-02-21 |