Assignee
Inventors
- Yasunobu Hirao (7 patents)
- Takashi Nagasaka (39 patents)
- Hidekazu Katsuyama (6 patents)
- Makoto Koyama (8 patents)
- Yuji Motoyama (8 patents)
- Mamoru Urushizaki (12 patents)
- Yukihiro Maeda (24 patents)
US Patent 5657203 · Granted Aug 12, 1997