Thum, David J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Thum, David J..The latest application filed is for "threshold protective cover with hinge".
- Thum, David J. - San Luis Obispo CA
- Thum; David J. - Chicago IL
- Thum; David J. - Roselle IL
| Patent | Date |
|---|---|
| Threshold protective cover with hinge App 20030126826 - Marshall, John R. ; et al. | 2003-07-10 |
| Exercise apparatus pedal mechanism Grant 5,741,205 - Doll , et al. April 21, 1 | 1998-04-21 |
| Exercise apparatus and method for simulating hill climbing Grant 5,403,252 - Leon , et al. April 4, 1 | 1995-04-04 |
| Stair climbing exercise apparatus utilizing drive belts Grant 5,238,462 - Cinke , et al. August 24, 1 | 1993-08-24 |
| Exercise apparatus for simulating stair climbing Grant 5,135,447 - Robards, Jr. , et al. August 4, 1 | 1992-08-04 |
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