Assignee
Inventors
- Yasunao Go (8 patents)
- Chiaki Hirano (4 patents)
- Shigeto Mori (13 patents)
- Masanori Kurosaki (5 patents)
- Akira Hayama (23 patents)
- Youichi Yamazaki (32 patents)
- Toshiyuki Kimura (65 patents)
- Yoshio Aoyagi (36 patents)
US Patent 4972184 · Granted Nov 20, 1990