Assignee
Inventors
- Toshio Ishikawa (61 patents)
- Hiroyuki Katayama (182 patents)
- Kazuo Van (28 patents)
- Tomoyuki Miyake (58 patents)
- Junichiro Nakayama (92 patents)
- Kenji Ohta (249 patents)
- Hideyoshi Yamaoka (16 patents)
US Patent 5214636 · Granted May 25, 1993