Assignee
Inventors
- Shigeru Akiyama (28 patents)
- Hidetoshi Ueno (5 patents)
- Koji Imagawa (3 patents)
- Akira Kitahara (11 patents)
- Sumio Nagata (3 patents)
- Kazuo Morimoto (3 patents)
- Tooru Nishikawa (4 patents)
- Masao Itoh (39 patents)
US Patent 4713277 · Granted Dec 15, 1987