Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4979528 | Gas actuated valve system | Andrew F. Asbra, Nicholas J. Bovis | 1990-12-25 |
| 4920999 | Air actuated valve system with seismic controller | Andrew F. Asbra, Nicholas J. Bovis | 1990-05-01 |
| 4852600 | Air actuated valve system with seismic controller | Andrew F. Asbra, Nicholas J. Bovis, Charles W. Greer | 1989-08-01 |
| 4745939 | Shock actuated shut-off valve with gastight reset system | Charles W. Greer, Andrew F. Asbra | 1988-05-24 |