Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |