Assignee
Inventors
- Yasuki Tamura (32 patents)
- Kazuo Koga (19 patents)
- Kojiro Okada (19 patents)
- Osamu Nakayama (133 patents)
- Keisuke Kawamura (25 patents)
- Kiyoshi Kawamura (86 patents)
- Norihiro Hukuda (1 patents)
US Patent 6558637 · Granted May 6, 2003