Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7520841 | Foldable aquatic stepper | — | 2009-04-21 |
| 7291096 | Amphibious foldable treadmill | Helen Ho | 2007-11-06 |
| 5566957 | In-line roller skate having adjustable biasing angle for each individual wheel | — | 1996-10-22 |
| 5357690 | Centrally fastened shoe buckle | — | 1994-10-25 |
| 5346231 | Skate construction with pre-set buffering, shock-absorbing and the topography compliance functions | — | 1994-09-13 |
| 5308152 | Wheel unit for in-line roller skate | — | 1994-05-03 |