Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5881156 | Portable, multi-functional, multi-channel wireless conference microphone | Norman Hirschberg | 1999-03-09 |
| 4831656 | Conference microphone for use with hearing impaired amplification system | Robert R. Southern | 1989-05-16 |