Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D350725 | Electric battery | David K. Powers, David Persen, Thomas W. Clary | 1994-09-20 |
| 4335792 | Working board for drilling rig | — | 1982-06-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D350725 | Electric battery | David K. Powers, David Persen, Thomas W. Clary | 1994-09-20 |
| 4335792 | Working board for drilling rig | — | 1982-06-22 |