Assignee
Inventors
- Shigeru Ura (8 patents)
- Haruo Tanaka (95 patents)
- Hisao Takagishi (17 patents)
- Yoshiya Fukuyama (4 patents)
- Hiroko Fukuyama, heir (2 patents)
- Takuya Fukuyama, heir (2 patents)
- Yuko Fukuyama (12 patents)
US Patent 5158611 · Granted Oct 27, 1992