Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D529568 | Golf swing training guide | — | 2006-10-03 |
| 6945875 | Golf training device | — | 2005-09-20 |
| 5687983 | Light weight ballet skis and method of manufacture | James Feketa | 1997-11-18 |
| 5673926 | Ballet ski | — | 1997-10-07 |
| 5560632 | Ballet ski | — | 1996-10-01 |
| 5297048 | Angular position extrapolation of a rotating crankshaft corrected for crankshaft acceleration and deceleration | — | 1994-03-22 |
| D339398 | Snow ski | — | 1993-09-14 |
| 4705291 | Alpine ski | — | 1987-11-10 |
| 4314606 | Apparatus for a treatment of flowing media which causes heat exchange and mixing | Walter Muller, Wilfried Walkenhorst, Gerhard Wild | 1982-02-09 |
| 4275177 | Process for continuous mass polymerization of alkenyl-aromatic compounds | Wilfried Walkenhorst, Gerhard Wild, Walter Muller | 1981-06-23 |