Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D360770 | Chair | Robert Scheper, Dale M. Groendal, James E. Abraham, Thomas R. Hahn, Douglas A. Smith +1 more | 1995-08-01 |
| D355303 | Chair | Robert Scheper, Dale M. Groendal, James E. Abraham, Thomas R. Hahn, Douglas A. Smith +1 more | 1995-02-14 |
| D351070 | Chair | Robert Scheper, Dale M. Groendal, James E. Abraham, Thomas R. Hahn, Douglas A. Smith +1 more | 1994-10-04 |