Assignee
Inventors
- Tsutomu Ishii (11 patents)
- Katsutoshi Ishikawa (10 patents)
- Sunao Maeda (10 patents)
- Masatoshi Gohbara (14 patents)
- Yasunaga Iwasaki (6 patents)
- Makoto Nishida (10 patents)
- Sadafumi Koda (7 patents)
US Patent 5178662 · Granted Jan 12, 1993