Assignee
Inventors
- Hiroshi Matsunaga (79 patents)
- Hisamitsu Honda (5 patents)
- Haruhiko Matsui (6 patents)
- Masahiko Akita (1 patents)
- Tatsuya Inaba (11 patents)
- Tetsusai Kondo (9 patents)
- Toshio Oka (30 patents)
US Patent 5012715 · Granted May 7, 1991