Assignee
Inventors
- Yorio Iwasaki (12 patents)
- Toshiro Okamura (33 patents)
- Shigeharu Arike (17 patents)
- Yasushi Shimada (16 patents)
- Hiroharu Kamiyama (4 patents)
- Eisaku Namai (3 patents)
- Fujio Kojima (3 patents)
US Patent 5233133 · Granted Aug 3, 1993