Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6917481 | Structure for tightly closing light exit end of rod integrator and rod integrator holder | Hitoshi Shimizu | 2005-07-12 |
| 4344167 | Pickup device | — | 1982-08-10 |
| 4218591 | Phonograph cartridge with very hard metal ceramic frame | — | 1980-08-19 |