1
Masato Miyauchi, Kaori Fujii, Takahiro Teramoto, Yuko Takeda, Takatsugu Obata, Akihiro Kondo: Crystalline oxotitanylphthalocyanine and electrophotographic photoreceptor using the same. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, April 3, 2001: US06210847 (10 worldwide citation)

An object of the invention is to improve the photosensitivity characteristics, characteristics on repeated use and stability of a photoreceptor. A photosensitive layer formed on a conductive support of a photoreceptor contains crystalline oxotitanylphthalocyanine having major peaks in an X-ray diffr ...


2
Hiroshi Sugimura, Yuko Takeda: Electrophotographic photoconductor and image formation method. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, November 21, 2000: US06150063 (4 worldwide citation)

An electrophotographic photoconductor comprises a charge generation layer containing a phthalocyanine compound as a charge generation material and a charge transfer layer containing a charge transfer material of a hole transfer type, the charge generation layer and the charge transfer layer are lami ...


3
Toshihisa Ishida, Masanori Matsumoto, Tadayuki Sawai, Kouji Kida, Yuko Takeda: Image forming apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, August 31, 2004: US06783906 (2 worldwide citation)

An image forming apparatus having a tandem system configuration, includes: a multiple number of photoreceptors which each form an electrostatic latent image; and a multiple number of developing devices each holding a different color toner from the others for development of the corresponding static l ...


4
Yuko Takeda, Kohji Shinkawa, Hitoshi Nagahama, Yoshikazu Kawasaki: Image forming apparatus. Sharp Kabushiki Kaisha, Edwards & Angell, June 24, 2004: US20040120522-A1

When an image signal is acquired, an encryption key is created, and the acquired image signal is encrypted with the created encryption key. An image based on the encrypted image signal is formed on a sheet having a memory, and the encryption key is written into the memory. The encrypted image formed ...


5
Toshihisa Ishida, Masanori Matsumoto, Tadayuki Sawai, Kouji Kida, Yuko Takeda: Image forming apparatus. Nixon & Vanderhye PC, November 20, 2003: US20030215266-A1

An image forming apparatus having a tandem system configuration, includes: a multiple number of photoreceptors which each form an electrostatic latent image; and a multiple number of developing devices each holding a different color toner from the others for development of the corresponding static l ...