Assignee
Inventors
- Hiroko Kaneko (32 patents)
- Masahiro Yamada (305 patents)
- Yukifumi Shigematsu (1 patents)
- Wataru Mizutani (10 patents)
- Akira Negishi (45 patents)
- Takamasa Kawakubo (16 patents)
- Yoshihisa Suda (41 patents)
US Patent 5218757 · Granted Jun 15, 1993