Assignee
Inventors
- Hideaki Yumoto (32 patents)
- Masao Yonemura (6 patents)
- Mamoru Nagase (11 patents)
- Yoshito Yamada (5 patents)
- Yoshiyasu Fujiwara (15 patents)
- Masakatsu Okamoto (6 patents)
- Yasutoshi Hosokawa (1 patents)
US Patent 4898022 · Granted Feb 6, 1990