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Ryoji Tan, Shigeyoshi Tanaka, Ken ichi Kishi, Yasuyuki Iguchi, Takeo Kudo, Takashi Amano, Hideki Kohno: Process for producing toner for electrophotography. Hitachi Chemical, Antonelli Terry Stout & Kraus, January 8, 1991: US04983488 (122 worldwide citation)

A toner for electrophotography produced by polymerizing a monomer dispersed by emulsification in the presence of a colorant and/or a magnetic powder, followed by coagulation is excellent in properties, particularly in cleaning properties, charge stability and caking resistance.


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Shigenori Yanagi, Masateru Sasaki, Akira Minami, Toshitaka Iwamoto, Shigeyoshi Tanaka: Optical disk access system. Fujitsu, Staas & Halsey, December 31, 1991: US05077719 (41 worldwide citation)

An optical disk access system capable of varying the focus position of a beam spot illuminating the optical disk. The focus position of the beam spot is varied in accordance with a mode of operation of the optical disk system. The various focus positions are automatically selected by the optical dis ...


3
Ryoji Tan, Shigeyoshi Tanaka, Ken ichi Kishi, Yasuyuki Iguchi, Takeo Kudo, Takashi Amano, Hideki Kohno: Process for producing toner for electrophotography. Hitachi Chemical Company, Antonelli Terry Stout & Kraus, November 19, 1991: US05066560 (40 worldwide citation)

A toner for electrophotography produced by polymerizing a monomer dispersed by emulsification in the presence of a colorant and/or a magnetic powder, followed by coagulation is excellent in properties, particularly in cleaning properties, charge stability and caking resistance.


4
Koichi Murayama, Shigeyoshi Tanaka, Atsushi Katayama, Ryoichi Hirayama, Takami Gema: Functional alcohol releasing substance. Kao Corporation, Oblon Spivak McClelland Maier & Neustadt P C, November 26, 2002: US06486333 (22 worldwide citation)

This invention discloses a substance which is a betaine ester of a functional alcohol that has an amido bond in its molecule and releases the functional alcohol.


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Shigeyoshi Tanaka: Position control system for information storage system. Fujitsu, Staas & Halsey, January 28, 1992: US05084661 (20 worldwide citation)

A position control system for an information storage system, for example, an optical disc system, includes a stepping motor for moving a read-write head and a DC motor for moving a beam reflecting unit, such as an object lens mounted on the head. The position control system drives the stepping motor ...


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Shigeyoshi Tanaka, Shigenori Yanagi: Track access control system for disk system, having eccentricity correction means. Fujitsu, Staas & Halsey, January 15, 1991: US04985882 (17 worldwide citation)

A track access control system for a disk storage system having an eccentricity correction unit. The eccentricity correction unit includes an eccentricity detecting unit, an eccentricity data storage unit and an eccentricity compensation unit. The eccentricity data storage unit includes a memory, an ...


7
Akira Minami, Shigeyoshi Tanaka: Optical disk tracking control system and method having normalized tracking error control signal. Fujitsu, Staas & Halsey, December 11, 1990: US04977551 (15 worldwide citation)

A tracking servo control system of an optical disk system produces a tracking control output signal for control of a tracking actuator which is adjusted to enable accurate positioning of a focussed light beam spot of the optical disk system at the center of a selected groove of a disk, for a variety ...


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Akio Mukoh, Yasuki Mori, Hirosada Morishita, Nobuhiko Shito, Shigeyoshi Tanaka: Liquid developer for electro photography. Hitachi, Hitachi Chemical Company, Craig & Antonelli, May 22, 1979: US04156034 (13 worldwide citation)

A liquid developer for electro photography which comprises a coloring agent, a coating agent, a resistivity controlling agent and a carrier liquid which disperses or dissolves the said three agents is suitable for providing high reproducibility of images when at least one of the following copolymers ...



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