Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5307699 | Seismic initiator for earthquake shutoff valves and the like | Roger P. Engdahl | 1994-05-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5307699 | Seismic initiator for earthquake shutoff valves and the like | Roger P. Engdahl | 1994-05-03 |