Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869699 | Flying disk with centrifugally activated sound generator | Eric D. Plambeck, Randall W. Karr | 1989-09-26 |
| 4852669 | Directional downhole drill apparatus | — | 1989-08-01 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869699 | Flying disk with centrifugally activated sound generator | Eric D. Plambeck, Randall W. Karr | 1989-09-26 |
| 4852669 | Directional downhole drill apparatus | — | 1989-08-01 |