Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4906499 | High density information record medium comprising a polymer material having a lubricant uniformly dispersed therein | Toshiaki Hamaguchi, Kazuhira Namikawa, Toshio Akai, Akio Kuroda, Akio Hata +1 more | 1990-03-06 |
| 4776935 | High density record including carbon black particles purified by electrolysis | Toshikazu Goshima, Akira Nishizawa, Kazuhira Namikawa, Toshiaki Hamaguchi | 1988-10-11 |
| 4646284 | High density information record medium using carbon black particles surface-treated with silicone oil | Toshiaki Hamaguchi, Kazuhira Namikawa, Akio Kuroda, Toshio Akai | 1987-02-24 |
| 4639908 | High density information records made of conductive resin compositions comprising inorganic power stabilizers | Kazuhira Namikawa, Toshiaki Hamaguchi, Akio Kuroda | 1987-01-27 |
| 4631717 | High density information records of an electrostatic capacitance type | Kazuhira Namikawa, Toshiaki Hamaguchi, Akio Kuroda, Akio Hata, Noriki Fujii | 1986-12-23 |
| 4592862 | Conductive resin composition and information record | Kazuhira Namikawa, Toshiaki Hamaguchi, Akio Kuroda, Akio Hata, Noriki Fujii | 1986-06-03 |
| 4548739 | High density information records made of conductive resin compositions comprising a specifically-treated vinyl chloride-base resin | Kazuhira Namikawa, Toshikazu Goshima, Toshiaki Hamaguchi, Akio Kuroda, Akio Hata +1 more | 1985-10-22 |
| 4547545 | High density information record made of a conductive resin composition comprising a specific type of dimethylpolysiloxane | Toshiaki Hamaguchi, Kazuhira Namikawa, Toshikazu Goshima, Akio Kuroda, Yoshiaki Kudo | 1985-10-15 |