Assignee
Inventors
- Akihiko Miyoshi (16 patents)
- Hitoshi Nakashima (22 patents)
- Hirotaka Kanazawa (39 patents)
- Masaki Watanabe (223 patents)
- Takeshi Tanaka (246 patents)
- Shigeuki Okimoto (1 patents)
- Norio Tsukaana (1 patents)
US Patent 4739855 · Granted Apr 26, 1988