Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10689289 | Optical glass, preform, and optical element | Ken KIKKAWA | 2020-06-23 |
| 10642184 | Optical writing device and image forming apparatus | Takahiro Matsuo, Masahiko Takahashi | 2020-05-05 |
| 10534298 | Displacement sensor and image forming device having the same | Masahiko Takahashi, Makoto Ooki, Wataru Senoo, Hidenari Tachibe, Hajime Taniguchi +2 more | 2020-01-14 |