Assignee
Inventors
- Toshio Ohara (19 patents)
- Toshio Takahashi (207 patents)
- Masayoshi Nishikawa (6 patents)
- Tutomu Niwa (1 patents)
- Takao Ogino (46 patents)
- Ryosuke Sako (10 patents)
- Hideaki Kaneko (14 patents)
US Patent 4830101 · Granted May 16, 1989