Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6917576 | Retarder and optical head device installing the same | Takehiko Nishiyama, Hiromasa Sato, Masahiro Murakawa, Yoshiharu Ooi, Yuzuru Tanabe | 2005-07-12 |
| 6580674 | Phase shifter and optical head device mounted with the same | Takehiko Nishiyama, Hiromasa Sato, Masahiro Murakawa, Yoshiharu Ooi, Yuzuru Tanabe | 2003-06-17 |
| 5142254 | Ultrasonic delay line device with an adjusting circuit for adjusting delay time, a comb-shaped filter using the ultrasonic delay line device and a method of adjusting delay time | Etsuji Kimura, Masahiko Maeda | 1992-08-25 |
| 4733204 | Ultrasonic-wave delay element | Michihiko Uemura, Tunaomi Fukui | 1988-03-22 |