Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5596649 | Sound concentrator for selectively collecting sound and concentrating and transmitting the collected sound | — | 1997-01-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5596649 | Sound concentrator for selectively collecting sound and concentrating and transmitting the collected sound | — | 1997-01-21 |