Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854945 | Bladder device and method for displacing air in a bottle bore shaft | William S. Beal | 1989-08-08 |
| 4817894 | Hermetic feedthrough change-out module device and method for use in a pressurized spacecraft hull | — | 1989-04-04 |