Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4648260 | Helium detector | — | 1987-03-10 |
| 4502321 | Apparatus and method for measuring the concentration of gases | — | 1985-03-05 |
| 4423407 | Apparatus and method for measuring the concentration of gases | — | 1983-12-27 |
| 4231249 | Apparatus and methods for monitoring concentrations of toxic substances in a work environment | — | 1980-11-04 |
| 4198298 | System and apparatus for control and optimization of filtration process | Leslie C. Hamer | 1980-04-15 |