Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370004 | Multiple port personal air sampling apparatus | Daniel E. Bruce, Charles H. Etheridge | 1994-12-06 |
| 5295790 | Flow-controlled sampling pump apparatus | Charles H. Etheridge, Craig D. Gestler | 1994-03-22 |
| 4858478 | Bellows type hand-operated air sampling pump | Robert S. Kush | 1989-08-22 |
| 4827778 | Liquid separator | Glenn H. Fertig, Albert L. Welker | 1989-05-09 |
| 4799374 | Liquid separator | Glenn H. Fertig, Albert L. Welker | 1989-01-24 |
| 4533520 | Circuit for constant temperature operation of a catalytic combustible gas detector | Thomas C. Fatur | 1985-08-06 |
| 4389903 | Indicating system for atmospheric pump arrangement | Gregory A. Bertone | 1983-06-28 |