Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5902218 | Multi-functional adjustable rotating resistance exerciser system | — | 1999-05-11 |
| 5749816 | Floor mountable and adjustable rotating resistance exerciser | Jeffrey T. Bertka | 1998-05-12 |
| 5709630 | Adjustable rotating resistance exerciser disposed on a flexible member | Jeffrey T. Bertka | 1998-01-20 |
| 5634871 | Adjustable rotating resistance exerciser | Jeffrey T. Bertka | 1997-06-03 |
| 5487709 | Adjustable rotating resistance exerciser | Jeffrey T. Bertka | 1996-01-30 |
| 5434763 | Headlight for motor vehicles | Guenter Hege, Ulrich Drews, Thomas Kienzler | 1995-07-18 |