Assignee
Inventors
- Michihiko Nakaya (8 patents)
- Yukiharu Fukushi (5 patents)
- Kenji Kodaka (22 patents)
- Masayuki Ooka (4 patents)
- Shirou Shiraishi (8 patents)
- Masahiko Nakamura (3 patents)
- Satoshi Numata (13 patents)
US Patent 5021412 · Granted Jun 4, 1991