Assignee
Inventors
- Hiroshi Sumiya (12 patents)
- Kousuke Fukaya (14 patents)
- Sunao Kawai (40 patents)
- Hiroyuki Sasaki (164 patents)
- Yoshiyuki Ban (10 patents)
- Ryohei Komiya (28 patents)
- Kiyoji Muramatsu (11 patents)
US Patent 5315691 · Granted May 24, 1994