Assignee
Inventors
- Keizo Anan (3 patents)
- Naoyuki Amaya (7 patents)
- Yoshishige Murata (12 patents)
- Takayuki Otsu (8 patents)
- Hiroshi Kawashima (147 patents)
- Satoshi Kubota (114 patents)
- Masaru Egawa (3 patents)
US Patent 4933406 · Granted Jun 12, 1990