Assignee
Inventors
- Hiroyasu Yamada (33 patents)
- Motoatsu Shiraishi (13 patents)
- Ken Tazou (7 patents)
- Mitsuki Nakamura (13 patents)
- Ryoichi Kageyama (7 patents)
- Akira Namiki (4 patents)
- Masaru Sasagawa (7 patents)
US Patent 4682685 · Granted Jul 28, 1987