Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048381 | Torque-indicating screwdriver | David Gordon Allen | 1991-09-17 |
| 4949602 | Wrench | Robert A. Letts, David Gordon Allen | 1990-08-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048381 | Torque-indicating screwdriver | David Gordon Allen | 1991-09-17 |
| 4949602 | Wrench | Robert A. Letts, David Gordon Allen | 1990-08-21 |