Assignee
Inventors
- Hiroshi Hamano (63 patents)
- Izumi Amemiya (10 patents)
- Hiroshi Nishimoto (86 patents)
- Takefumi Namiki (11 patents)
- Izumi Yokota (7 patents)
- Tadashi Okiyama (30 patents)
- Minoru Seino (37 patents)
US Patent 5074631 · Granted Dec 24, 1991