Assignee
Inventors
- Yasuo Sekine (15 patents)
- Nobuhiro Hirakawa (1 patents)
- Noriaki Kashiwaba (4 patents)
- Tetsuaki Yamaura (15 patents)
- Hisako Harada (1 patents)
- Teruo Kutsuma (2 patents)
- Unknown
- Akihiro Sekine (7 patents)
- Yoshikazu Isowa (9 patents)
US Patent 4837316 · Granted Jun 6, 1989