Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998434 | Gas leakage detector | — | 1991-03-12 |
| 4979528 | Gas actuated valve system | Martin R. Asbra, Nicholas J. Bovis | 1990-12-25 |
| 4920999 | Air actuated valve system with seismic controller | Martin R. Asbra, Nicholas J. Bovis | 1990-05-01 |
| 4895018 | Gas leakage detector | — | 1990-01-23 |
| 4852600 | Air actuated valve system with seismic controller | Martin R. Asbra, Nicholas J. Bovis, Charles W. Greer | 1989-08-01 |
| 4745939 | Shock actuated shut-off valve with gastight reset system | Charles W. Greer, Martin R. Asbra | 1988-05-24 |