Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657181 | Optical element used in compact interference measuring apparatus detecting plurality of phase difference signals | Ko Ishizuka, Hidejiro Kadowaki, Shigeki Kato, Takayuki Kadoshima, Sakae Horyu | 2003-12-02 |
| 6618218 | Displacement detecting apparatus and information recording apparatus | Hidejiro Kadowaki, Ko Ishizuka, Shigeki Kato, Takayuki Kadoshima, Sakae Horyu | 2003-09-09 |