Assignee
Inventors
- Hamao Umezawa (151 patents)
- Tomio Takeuchi (160 patents)
- Kuniaki Tatsuta (17 patents)
- Tomoyuki Ishikura (31 patents)
- Rokuro Okamoto (19 patents)
- Masao Yamamoto (117 patents)
- Kohki Kiyoshima (2 patents)
US Patent 4463171 · Granted Jul 31, 1984