Assignee
Inventors
- Tsuyoshi Ando (16 patents)
- Nakayasu Hirono (2 patents)
- Hirotoshi Nakao (6 patents)
- Akio Mito (7 patents)
- Kazuyuki Kihara (3 patents)
- Kosuke Hatakenaka (1 patents)
- Hiroshi Ogawa (431 patents)
US Patent 4928730 · Granted May 29, 1990