Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8290195 | Acoustic radiation pattern adjusting | Geoffrey C. Chick | 2012-10-16 |
| 7584820 | Acoustic radiating | Robert Preston Parker | 2009-09-08 |
| 7565948 | Acoustic waveguiding | Robert Preston Parker, Hal P. Greenberger | 2009-07-28 |
| 6278789 | Frequency selective acoustic waveguide damping | — | 2001-08-21 |
| 4621708 | Tweeter bidirectional radiating | — | 1986-11-11 |