Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6630044 | Method and wire element for retreading a tire | Ninneh Gripenholt | 2003-10-07 |
| 4536242 | Method and apparatus for retreading vehicle tires | Ninneh Gripenholt, Benny Berggren | 1985-08-20 |
| 4401873 | Microwave heating device with tapered waveguide | Benny Berggren | 1983-08-30 |