Assignee
Inventors
- Isamu Washizuka (27 patents)
- Shintaro Hashimoto (51 patents)
- Masaru Kakumae (2 patents)
- Yuuichi Sato (14 patents)
- Isao Fujisawa (4 patents)
- Yukihiro Inoue (31 patents)
- Sadakatsu Hashimoto (10 patents)
US Patent 4192060 · Granted Mar 11, 1980