Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829581 | Electrodynamic transducer comprising a two-part diaphragm | Joris A. M. Nieuwendijk | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829581 | Electrodynamic transducer comprising a two-part diaphragm | Joris A. M. Nieuwendijk | 1989-05-09 |