Assignee
Inventors
- Yoshiaki Zama (5 patents)
- Itsuki Umeda (5 patents)
- Seizo Katayama (2 patents)
- Yuichi Funahashi (13 patents)
- Junichiro Watanabe (20 patents)
- Kiyoshi Takeda (9 patents)
- Hirofumi Yoshida (46 patents)
US Patent 5171787 · Granted Dec 15, 1992