Issued Patents All Time
Showing 76–100 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837081 | Magnetic recording medium | Hajime Miyatsuka, Tsutomu Okita, Nobuo Tsuji | 1989-06-06 |
| 4830474 | Variable magnification optical system | Hiroki Nakayama, Yasuhisa Sato, Kouji Oizumi | 1989-05-16 |
| 4815830 | Small sized zoom lens | Yasuhisa Sato, Hiroki Nakayama | 1989-03-28 |
| 4812369 | Magnetic recording medium | Kazuko Hanai, Takahito Miyoshi | 1989-03-14 |
| 4808503 | Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide | Hisato Itoh, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |
| 4808507 | Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based | Hisato Itoh, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |
| 4798755 | Magnetic recording medium | Hajime Miyatsuka | 1989-01-17 |
| 4789590 | Abrasive tape | Masami Sato, Masaaki Fujiyama, Masami Suzuki | 1988-12-06 |
| 4788103 | Magnetic recording medium | Tsutomu Okita, Kazuko Hanai | 1988-11-29 |
| 4784480 | Focusing-in-part lens system | Hideo Yokota | 1988-11-15 |
| 4784914 | Magnetic recording medium | Akihiro Matsufuji, Akira Kasuga, Shigeo Komine, Hajime Miyatsuka | 1988-11-15 |
| 4784907 | Magnetic recording medium | Akihiro Matsufuji, Akira Kasuga, Shigeo Komine, Hajime Miyatsuka | 1988-11-15 |
| 4770508 | Conversion lens releasably attached behind master lens | Yasuhisa Sato, Hiroki Nakayama, Kouji Oizumi | 1988-09-13 |
| 4757336 | View finder of variable magnification | Hiroki Nakayama, Yasuhisa Sato, Kouji Oizumi | 1988-07-12 |
| 4752530 | Magnetic recording medium | Yoshito Mukaida | 1988-06-21 |
| 4751539 | Variable power finder | Yasuhisa Sato, Hiroki Nakayama, Kouji Oizumi | 1988-06-14 |
| 4734218 | Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs | Keisuke Takuma, Kimitoshi Kato, Hiroshi Aiga, Tsutomu Nishizawa | 1988-03-29 |
| 4728577 | Magnetic recording medium | Yoshito Mukaida | 1988-03-01 |
| 4726992 | Magnetic recording medium | Takamitsu Asai, Masaaki Fujiyama, Takahito Miyoshi | 1988-02-23 |
| 4726668 | Zoom lens of short total length | Hiroki Nakayama, Yasuhisa Sato, Kouji Oizumi | 1988-02-23 |
| 4715692 | Varifocal type finder | Kazuo Fujibayashi, Yasuhisa Sato, Hideo Yokota | 1987-12-29 |
| 4711819 | Magnetic recording medium | Kazuko Hanai | 1987-12-08 |
| 4702581 | Flash device for camera | Yasuhisa Sato, Hiroki Nakayama, Kouji Oizumi | 1987-10-27 |
| 4697882 | Beam splitter for changing optical paths small tilt | Yasuhisa Sato, Hiroki Nakayama, Kouji Oizumi | 1987-10-06 |
| 4695134 | Compact photographic lens | Hiroki Nakayama, Yasuhisa Sato | 1987-09-22 |