Assignee
Inventors
- Minoru Nakada (5 patents)
- Kenji Umezu (11 patents)
- Yasuhiro Shinma (24 patents)
- Kazuaki Kamiyama (2 patents)
- Yoshihiro Udagawa (1 patents)
- Masaya Yamazaki (8 patents)
- Mitsuo Murano (3 patents)
- Minoru Inoue (42 patents)
US Patent 4240264 · Granted Dec 23, 1980