Assignee
Inventors
- Morihiko Shimamura (13 patents)
- Jun Kubo (39 patents)
- Hitoshi Kubota (100 patents)
- Norio Fujiki (13 patents)
- Yoshio Tobisawa (6 patents)
- Yasuki Ishikawa (36 patents)
- Kazuyoshi Fukawa (3 patents)
US Patent 4835970 · Granted Jun 6, 1989