Assignee
Inventors
- Kiyoshi Mizusawa (7 patents)
- Yasuhiko Imai (2 patents)
- Katsumi Yuasa (9 patents)
- Hirokazu Koyama (1 patents)
- Nobuyuki Yamaji (17 patents)
- Shigehiro Kataoka (30 patents)
- Tetsuya Oguma (8 patents)
US Patent 5231193 · Granted Jul 27, 1993