Assignee
Inventors
- Kozo Uemura (15 patents)
- Toshihiko Ishigami (13 patents)
- Toshio Hiruta (13 patents)
- Mikio Matsuda (47 patents)
- Shigehisa Kawatsuru (9 patents)
- Isao Yamazaki (61 patents)
- Akio Ishizuka (18 patents)
US Patent 6495962 · Granted Dec 17, 2002