Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828257 | Electronically controlled exercise system | Michael J. Knauer, Berle E. Rabenberg, Arthur C. Bentley, Richard O. Keelor | 1989-05-09 |
| D297958 | Chest press exercise station | Thomas E. Stephenson, Michael Aten, Berle E. Rabenberg | 1988-10-04 |
| D297959 | Leg extension exercise station | Thomas E. Stephenson, Michael Aten, Berle E. Rabenberg | 1988-10-04 |
| D297960 | Bicep curl exercise station | Thomas E. Stephenson, Michael Aten, Berle E. Rabenberg | 1988-10-04 |
| D284513 | Extension ladder shelf | — | 1986-07-01 |
| D281626 | Extension ladder stepdeck | — | 1985-12-03 |