Assignee
Inventors
- Kiyotomo Seto (15 patents)
- Hiroo Matsumoto (27 patents)
- Yoshimasa Kamikawaji (9 patents)
- Kazuhiko Ohrai (14 patents)
- Keisuke Ohdoi (2 patents)
- Ryozo Sakoda (26 patents)
- Yukinori Masuda (8 patents)
US Patent 5272271 · Granted Dec 21, 1993