Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865099 | Tire treads with variable depth grooves | — | 1989-09-12 |
| D302411 | Tire | Frank Weyrich | 1989-07-25 |
| D302412 | Design for a tire | Frank Weyrich | 1989-07-25 |
| 4823855 | Pneumatic tire tread pattern | Leo J. Hitzky, Frederick W. Miller, Richard L. Galante, Terry J. Waibel, Michael A. Kolowski +1 more | 1989-04-25 |