Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879936 | Circular saw blade having removable teeth | — | 1989-11-14 |
| 4857851 | Fixing a geographical reference of a vehicle traveling through a pipeline | Charles W. Gregory | 1989-08-15 |