Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4320264 | Loudspeaker with a heat resistant two-part diaphragm | Lydia Isfan | 1982-03-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4320264 | Loudspeaker with a heat resistant two-part diaphragm | Lydia Isfan | 1982-03-16 |