Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5183265 | Racquets, in particular tennis racquets | Helmut Umlauft | 1993-02-02 |
| 5075056 | Process for the production of a ball game racket frame | Helmut Umlauft | 1991-12-24 |
| 4776592 | Device for the protection of the strings of a ball racket, particularly tennis racket | Helmut Umlauft | 1988-10-11 |