Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876708 | Cordless telephone system | Noboru Saegusa, Toshihiro Hara, Ryoji Kawasaki, Kazuyuki Tate, Syoji Huse | 1989-10-24 |
| 4875231 | Radio telephone system | Toshihiro Hara, Akio Yotsutani, Ryoji Kawasaki, Kazuyuki Tate, Syoji Huse | 1989-10-17 |
| 4854493 | Method and apparatus for cutting welding steel strips | Mamoru Fujii, Kazuo Noda, Shoji Nagasaka, Hiroshi Tajika | 1989-08-08 |
| 4840303 | Method and apparatus for cutting and welding steel strips | Mamoru Fujii, Kazuo Noda, Shoji Nagasaka, Hiroshi Tajika | 1989-06-20 |
| 4820831 | Process for preparing 4,4'-dihydroxydiphenyl sulfone having high purity | Eiji Ogata, Nobuyuki Nate | 1989-04-11 |