Assignee
Inventors
- Shinkichi Shimizu (12 patents)
- Takayasu Niwa (2 patents)
- Nobuyuki Abe (5 patents)
- Masanori Doba (4 patents)
- Akira Iguchi (4 patents)
- Hiroshi Ichihashi (16 patents)
- Masaru Kitamura (22 patents)
US Patent 5071802 · Granted Dec 10, 1991