Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4639906 | Magnetic recording on tracking controlled grooveless medium having magnetic and capacitance properties | — | 1987-01-27 |
| 4544604 | Heat-sensitive recording paper and filler therefor | Koichi Usui, Masahide Ogawa, Teiji Sato, Masanori Tanaka, Seikichi Takahashi +2 more | 1985-10-01 |
| 4509064 | Heat-sensitive recording paper and filler therefor | Koichi Usui, Masahide Ogawa, Teiji Sato, Masanori Tanaka, Seikichi Takahashi +2 more | 1985-04-02 |
| 4503529 | Record stylus for capacitance disks | Yoshiyo Wada, Hideaki Takehara | 1985-03-05 |
| 4497052 | Stylus for reproducing information signals recorded on a recording medium | Yoshiyo Wada, Hisao Kinjo | 1985-01-29 |
| 4488281 | Capacitance detection type record stylus having a conductive shank | Hideaki Takehara, Yoshiyo Wada, Keiji Segawa | 1984-12-11 |
| 4476169 | Multilayer glass structure | Hiroshi Nishino, Fumiichi Ogino, Tetsuo Masuko, Masao Takahashi | 1984-10-09 |
| 4420419 | Abrasion-resistant granular zeolite and process for preparation thereof | Masahide Ogawa, Tetsuo Masuko, Hideo Sugai, Masao Takahashi | 1983-12-13 |
| 4413334 | Pickup arm with servo-controlled stylus | — | 1983-11-01 |
| 4402018 | System using a rotating medium for recording cinematographic picture images | Yoshiyo Wada, Hisao Kinjo, Keiji Ozawa, Kazuo Tatsuguchi, Atsumi Hirata | 1983-08-30 |
| 4357699 | Capacitance detection type stylus with diamond body and electrode having the same wear resistance properties | Hideaki Takehara, Yoshiyo Wada, Kyusaku Suga, Hitoshi Watanabe | 1982-11-02 |
| 4339812 | Signal pickup cartridge for reproducing signals recorded on rotating recording mediums | — | 1982-07-13 |
| 4273967 | Stylus for reproducing capacitive videodisc | Yoshiyo Wada, Hisao Kinjo | 1981-06-16 |
| 4199782 | Stylus for reproducing capacitive videodisc | Yoshiyo Wada, Hisao Kinjo | 1980-04-22 |