Assignee
Inventors
- Kenichi Ishibashi (41 patents)
- Takehisa Hayashi (49 patents)
- Tsutomu Goto (17 patents)
- Hideki Murayama (14 patents)
- Akira Yamagiwa (57 patents)
- Yasuhiro Ishii (36 patents)
- Naoki Hamanaka (41 patents)
- Masabumi Shibata (17 patents)
US Patent 6049221 · Granted Apr 11, 2000