Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5433046 | Telescoping panel construction | Kenneth J. MacQuarrie, Douglas D. Benner | 1995-07-18 |
| 4214726 | Chair control | Jack R. Knoblauch, Charles C. Pergler, Donald D. Korell | 1980-07-29 |
| 4183581 | Posture iron with safety stop | Joseph M. Wisniewski, Charles C. Pergler | 1980-01-15 |