Assignee
Inventors
- Tetsuo Matsumoto (17 patents)
- Keizo Tsujimoto (3 patents)
- Katsuto Matsuzawa (1 patents)
- Shunichiro Hamada (1 patents)
- Kouzi Shinogi (1 patents)
- Satomi Nagai (1 patents)
- Takayuki Imamura (23 patents)
- Akiko Kuroyanagi (1 patents)
US Patent 4940772 · Granted Jul 10, 1990