Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000638 | Screw for contaminated pre-tapped holes | Ernest W. Billingham | 1991-03-19 |
| 4973209 | Screw for contaminated pre-tapped holes | Ernest W. Billingham | 1990-11-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000638 | Screw for contaminated pre-tapped holes | Ernest W. Billingham | 1991-03-19 |
| 4973209 | Screw for contaminated pre-tapped holes | Ernest W. Billingham | 1990-11-27 |