Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7387452 | Semiconductor laser module | Hiroyoshi Matsumura, Shojiro Hayashi | 2008-06-17 |
| 7343064 | Optical switch and optical add/drop multiplexer | Hiroyoshi Matsumura | 2008-03-11 |
| 4558443 | Moving coil type pickup cartridge | Kazuhiro Nakamura | 1985-12-10 |