Assignee
Inventors
- Yutaka Koizumi (115 patents)
- Hideya Furuta (19 patents)
- Yoshihiro Sakai (66 patents)
- Mitsuru Mamizuka (12 patents)
- Tsukasa Adachi (13 patents)
- Itsuo Ikeda (13 patents)
- Katsuo Sakai (35 patents)
US Patent 4664501 · Granted May 12, 1987