Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6290011 | Front wheel/rear wheel drive convertible wheelchair | John T. Langaker, DuWayne E. Kramer, Jr., James Ernst | 2001-09-18 |
| 6220382 | Powered wheelchair with separating frame | DuWayne E. Kramer, Jr., James Ernst | 2001-04-24 |
| 5816614 | Tiller assembly for personal mobility vehicles | DuWayne E. Kramer, Jr., James Ernst, James C. Hile | 1998-10-06 |