Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841817 | Gun drill coolant bushing and method of making same | Thomas Heimbigner | 1989-06-27 |
| 4804300 | Gun drill coolant bushing and method of making same | Thomas Heimbigner | 1989-02-14 |