Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12321054 | Optical testing apparatus | Takao Sakurai | 2025-06-03 |
| 11762072 | Optical testing apparatus and method of testing optical measuring instrument | Takao Sakurai | 2023-09-19 |
| 11635374 | Optical testing apparatus | Shin Masuda, Takao Sakurai, Hidenobu Matsumura, Takao Seki | 2023-04-25 |
| 5390729 | Refractory element | Akira Sakurai, Masahiro Shiotsu, Toshikazu Yano, Masao Ochi | 1995-02-21 |
| 5379610 | Refractory element | Akira Sakurai, Masahiro Shiotsu, Toshikazu Yano, Masao Ochi | 1995-01-10 |
| 5329785 | Refractory element | Akira Sakurai, Masahiro Shiotsu, Toshikazu Yano, Masao Ochi | 1994-07-19 |