Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304358 | Stair climbing exercise apparatus | Timothy O. Armstrong, John W. Bull | 1989-10-31 |
| D303695 | Skiing exerciser or similar article | Larry J. Graf, Randolph F. Miller | 1989-09-26 |
| D302451 | Stair climbing exercise apparatus | John W. Bull | 1989-07-25 |
| D300046 | Exercise bicycle | Timothy O. Armstrong, Randolph F. Miller | 1989-02-28 |
| D299369 | Skiing exerciser or similar article | Larry J. Graf, Randolph F. Miller | 1989-01-10 |