Nelson; Philip H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Nelson; Philip H..The latest application filed is for "suspendable speaker".
- Nelson; Philip H. - Spring Valley NY
| Patent | Date |
|---|---|
| Suspendable speaker Grant D297,836 - Nelson , et al. September 27, 1 | 1988-09-27 |
| Sound-masking system for core modules used in an office Grant 4,761,921 - Nelson August 9, 1 | 1988-08-09 |
| Plug-mounted background noise amplifier Grant D297,011 - Quigley , et al. August 2, 1 | 1988-08-02 |
| Plug-mounted background noise amplifier enclosure Grant D280,721 - Quigley , et al. September 24, 1 | 1985-09-24 |
| Circuit for producing noise generation for sound masking Grant 4,450,321 - Quigley , et al. May 22, 1 | 1984-05-22 |
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