Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D297836 | Suspendable speaker | William D. Quigley | 1988-09-27 |
| 4761921 | Sound-masking system for core modules used in an office | — | 1988-08-09 |
| D297011 | Plug-mounted background noise amplifier | William D. Quigley | 1988-08-02 |
| D280721 | Plug-mounted background noise amplifier enclosure | William D. Quigley | 1985-09-24 |
| D277956 | Speaker enclosure for raised floor installation | William D. Quigley | 1985-03-12 |
| 4450321 | Circuit for producing noise generation for sound masking | William D. Quigley | 1984-05-22 |