Assignee
Inventors
- Masahiko Ohta (31 patents)
- Kazuo Kaneko (26 patents)
- Hiroyuki Iyama (9 patents)
- Seizi Kado (1 patents)
- Mitisuru Hirao (1 patents)
- Hironori Ishizaka (7 patents)
- Kenji Ohmaru (2 patents)
- Takao Murata (2 patents)
US Patent 5187490 · Granted Feb 16, 1993