Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D855801 | Stethoscope handle | Christopher David Connolly, Anne Armstrong, Steve Austin | 2019-08-06 |
| D381215 | Conference/guest chair | Duane M. Perpich, Donald A. George | 1997-07-22 |
| D372799 | Pedestal based executive chair | Donald A. George, Duane M. Perpich | 1996-08-20 |