Assignee
Inventors
- Ryoichi Tanaka (90 patents)
- Toshiaki Hasegawa (79 patents)
- Jun Sudo (6 patents)
- Tsutomu Yasuda (13 patents)
- Yukio Mizutani (4 patents)
- Masashi Katsuki (1 patents)
- Hiroshige Ikebe, deceased (1 patents)
US Patent 5997292 · Granted Dec 7, 1999