Assignee
Inventors
- Takashi Nakagawa (21 patents)
- Masayasu Kurono (73 patents)
- Makoto Sato (30 patents)
- Tsutomu Ishida (5 patents)
- Kazushi Tokita (2 patents)
- Unknown
- Masato Azuma (4 patents)
- Satoshi Uenoyama (1 patents)
US Patent 4971799 · Granted Nov 20, 1990