Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4570895 | Chair control tension adjustment assembly | Ronald L. Whitwam | 1986-02-18 |
| 4390206 | Synchrotilt chair control | Frederick S. Faiks, Ronald L. Whitwam, Jack R. Knoblauch, Duane M. Beukema, Kenneth W. Hozeski | 1983-06-28 |
| 4375301 | Chair seat adjustment assembly | Jack R. Knoblauch | 1983-03-01 |
| 4214726 | Chair control | Alexander A. Karrip, Jack R. Knoblauch, Donald D. Korell | 1980-07-29 |
| 4183581 | Posture iron with safety stop | Alexander A. Karrip, Joseph M. Wisniewski | 1980-01-15 |