Assignee
Inventors
- Futoshi Uchiyama (4 patents)
- Ko Agatsuma (1 patents)
- Takeshi Ohara (8 patents)
- Koichi Tsukamoto (6 patents)
- Sumiyuki Ishigami (3 patents)
- Mitsuru Sato (213 patents)
- Hisashi Sugimoto (2 patents)
US Patent 4986670 · Granted Jan 22, 1991