Theisen; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Theisen; David A..The latest application filed is for "safety light cover".
- Theisen; David A. - Rocky Point NC
- Theisen; David A. - Hampstead NC
| Patent | Date |
|---|---|
| Safety light cover Grant D559,721 - Zhang , et al. January 15, 2 | 2008-01-15 |
| Illuminated safety helmet Grant 6,497,493 - Theisen December 24, 2 | 2002-12-24 |
| Sound conditioner Grant D364,404 - Theisen November 21, 1 | 1995-11-21 |
| Sound conditioner Grant D347,008 - Theisen , et al. May 17, 1 | 1994-05-17 |
| Synthesized telephone call announcer Grant D335,129 - Theisen , et al. April 27, 1 | 1993-04-27 |
| Sound conditioner for masking intruding noises Grant D311,065 - Theisen , et al. October 2, 1 | 1990-10-02 |
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