Assignee
Inventors
- Hiroshi Ohyama (9 patents)
- Kimiyoshi Kaneko (10 patents)
- Hiromichi Ishikawa (12 patents)
- Sanae Takada (3 patents)
- Ken Morita (6 patents)
- Takuo Wada (7 patents)
- Masahiko Miyahara (4 patents)
- Masazumi Arakawa (1 patents)
US Patent 4420486 · Granted Dec 13, 1983