Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6122846 | Force monitoring shoe | Frank B. Gray, David Gray, Raimer G. Riffert | 2000-09-26 |
| 5566479 | Shoe contruction for use by diabetic persons | Frank B. Gray, Rainer G. Riffert | 1996-10-22 |
| 5357696 | Device for measuring force applied to a wearer's foot | Frank B. Gray | 1994-10-25 |