Assignee
Inventors
- Kazumi Naitoh (5 patents)
- Yoshiaki Arakawa (6 patents)
- Takashi Ikezaki (9 patents)
- Shoji Yabe (21 patents)
- Yutaka Yokoyama (85 patents)
- Yuichi Hamaguchi (11 patents)
- Yasunobu Roppongi (1 patents)
US Patent 4889536 · Granted Dec 26, 1989