YF

Yozo Fujii

KO Konica: 17 patents #83 of 1,958Top 5%
KC Konishiroku Photo Industry Co.: 6 patents #151 of 894Top 20%
SC Sumitomo Chemical: 1 patents #2,469 of 4,033Top 65%
Overall (All Time): #176,030 of 4,157,543Top 5%
24
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6102386 Image forming apparatus Masahiro Shigetomi 2000-08-15
5903806 Developing agent replenishing apparatus and cartridge Isao Matsuoka 1999-05-11
D403348 Toner container Isao Matsuoka, Ryo Takimura, Takashi Tamura 1998-12-29
5828934 Driving device of developing units and toner replenishing units for use in image forming apparatus Takashi Tamura, Kenji Sato, Masahiro Shigetomi, Isao Matsuoka 1998-10-27
5722020 Developer container and developer supplying apparatus Isao Matsuoka, Yoshikazu Ikunami 1998-02-24
5589919 Toner cartridge and color image forming apparatus in use therewith Yoshikazu Ikunami, Satoshi Minami 1996-12-31
5585898 Developing unit driving mechanism in use with a color image forming apparatus 1996-12-17
5486898 Color image forming apparatus with photoreceptor protector Hiroyuki Moriguchi, Yoshikazu Ikunami, Masahiko Matsunawa, Akihiko Tamura, Kazuo Yasuda +6 more 1996-01-23
5381167 Color image forming apparatus Tadashi Miwa, Hisao Satoh, Atsushi Ogane, Isao Matsuoka, Tadayoshi Ikeda 1995-01-10
5323211 Driving device of rotational body for use in image forming apparatus Toru Makino, Tadashi Miwa 1994-06-21
5291223 Exposure unit for a multicolor image forming apparatus capable of better registration of the multicolor images Atsushi Ogane, Tadashi Miwa, Isao Matsuoka, Hideo Satoh 1994-03-01
5276491 Image forming apparatus Hiroshi Fuma, Mitsuo Motohashi, Akihiko Kakita 1994-01-04
5182602 Image forming apparatus Akihiko Kakita, Tsugio Sugizaki 1993-01-26
5172174 Transfer device with insulated shield Hiroshi Fuma, Mitsuo Motohashi, Akihiko Kakita 1992-12-15
5153653 Image forming apparatus Hiroshi Fuma, Mitsuo Motohashi, Akihiko Kakita, Takashi Murahashi, Kazuo Yasuda +2 more 1992-10-06
5065693 Developing device Kunihisa Yoshino, Mitsuo Motohashi 1991-11-19
4806989 Optical correction device Taku Saito 1989-02-21
4796059 Image forming apparatus with magnification changing device Taku Saito 1989-01-03
4636058 Exposure optical apparatus 1987-01-13
4448514 Split exposure optical system for copying machine Hirofumi Sakaguchi, Tsugio Hirabayashi 1984-05-15
4444488 Adjustable mirror support for copying apparatus Kazuo Murakami, Hirofumi Sakaguchi 1984-04-24
4432633 Electrophotographic reproducing apparatus Isao Nosaka, Hirofumi Sakaguchi, Takao Shiozawa 1984-02-21
4408867 Optical scanning unit driving device for electrophotographic reproducing apparatus Takao Shiozawa 1983-10-11
4248794 Process for producing 2-amino-4-acylaminophenyl ether Hiromichi Yamaguchi 1981-02-03