Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7594700 | Contoured seating structure | William E. Stumpf, Rodney C. Schoenfelder, Donald Chadwick, Timothy P. Coffield, Randy J. Sayers +2 more | 2009-09-29 |
| D420523 | Chair | William E. Stumpf, Rodney C. Schoenfelder, Donald Chadwick | 2000-02-15 |