Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315769 | Teardrop propulsion plate footwear | Daniel T. Barry, Raymond M. Fredericksen, Ruk Peterson | 1994-05-31 |
| 5191727 | Propulsion plate hydrodynamic footwear | Daniel T. Barry, Raymond M. Fredericksen, Ruk Peterson | 1993-03-09 |
| 5052130 | Spring plate shoe | Daniel T. Barry, Ray M. Fredericksen, Ruk Peterson | 1991-10-01 |