Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4815141 | Apparatus and methods for removing unwanted components from a communications signal | Victor O. Richardson | 1989-03-21 |
| 4808946 | Lightweight, high power audio amplifier and power supply | M. Robert McKinley | 1989-02-28 |
| 4803733 | Loudspeaker diaphragm mounting system and method | James J. Croft, III | 1989-02-07 |