Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5915450 | Riser sleeves for custom sizing and firm gripping | Ronald C. Aufderheide, John L. Perrins | 1999-06-29 |
| D397702 | Riser sleeve | Ronald C. Aufderheide, John L. Perrins | 1998-09-01 |