Assignee
Inventors
- Hirokazu Shimatake (2 patents)
- Kenzo Natsume (1 patents)
- Takeshi Kojima (147 patents)
- Shuichi Ogawa (6 patents)
- Ryuichi Nara (2 patents)
- Shigeru Uchida (36 patents)
- Haruyoshi Takagishi (8 patents)
US Patent 4273504 · Granted Jun 16, 1981