Assignee
Inventors
- Eiichi Hamada (14 patents)
- Koji Shimoji (4 patents)
- Suekichi Hangeishi (3 patents)
- Mamoru Yashima (4 patents)
- Takahisa Ueda (38 patents)
- Keiji Okada (100 patents)
- Shoichi Nishiwaki (1 patents)
US Patent 5308090 · Granted May 3, 1994