Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7319763 | Power amplification for parametric loudspeakers | James J. Croft, III | 2008-01-15 |
| 7158646 | Signal derived bias supply for electrostatic loudspeakers | James J. Croft, III | 2007-01-02 |
| 6628791 | Signal derived bias supply for electrostatic loudspeakers | James J. Croft, III | 2003-09-30 |
| 6108427 | Method and apparatus for eliminating audio feedback | Elwood G. Norris | 2000-08-22 |