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Takaaki Ikegami, Eiji Kurimoto, Takashi Rokutanzono, Katsuichi Ohta, Masaomi Sasaki, Yasuo Suzuki, Kaoru Tadokoro, Megumi Kawahara, Masayuki Koyano: Electrophotographic photoconductor containing disazo and trisazo pigments. Ricoh Company, Oblon Spivak Mcclelland Maier & Neustadt P C, November 26, 1996: US05578405 (61 worldwide citation)

An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and a simultaneously pulverized mixture including at least one disazo pigment of formula (1) and at least ...


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Hitoshi Watanabe, Yoshimi Kuroda, Kaoru Tadokoro: Ferroelectric memory. Olympus Optical, Symetrix Corporation, Frishauf Holtz Goodman Langer & Chick, January 2, 1996: US05481490 (52 worldwide citation)

Disclosed is a ferroelectric memory, comprising a semiconductor substrate, a ferroelectric thin film capacitor of a laminate structure formed on the substrate, the laminate structure consisting of a lower electrode, an oxide ferroelectric thin film and an upper electrode, and a protective thin film ...


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Akitoshi Toda, Kaoru Tadokoro, Yasuji Nagata, Etsuo Shinohara, Yoshimitsu Enomoto, Michio Takayama, Ryo Ohta: Cantilever for a scanning probe microscope and a method of manufacturing the same. Olympus Optical, Frishauf Holtz Goodman & Woodward, December 28, 1993: US05272913 (20 worldwide citation)

A cantilever for a scanning probe microscope comprises a lever section and a probe section disposed near the free end thereof. The probe section includes a conical distal end portion having a narrow point angle and a bulging proximal end portion continuous with the distal end portion. The cantilever ...


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Kaoru Tadokoro, Masayuki Shoshi, Michihiko Namba, Tomoyuki Shimada, Chiaki Tanaka: REACTION PRODUCT, PROCESS OF PRODUCING SAME, ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR USING SAME, ELECTROPHOTOGRAPHIC APPARATUS HAVING THE PHOTOCONDUCTOR, AND PROCESS CARTRIDGE FOR ELECTROPHOTOGRAPHIC APPARATUS. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, October 15, 2002: US06465648 (20 worldwide citation)

A reaction product useful as an organic photoconductive material for electrophotographic photoconductors is provided, obtainable by reacting (i) a nitrile derivative, (ii) a phthalonitrile derivative or a 1,3-diiminoisoindoline derivative and, if necessary, (iii) a metal or a metal-containing compou ...


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Michihiko Namba, Masayuki Shoshi, Kaoru Tadokoro: Tetraazaporphyrin pigment for use in electrophotographic photoconductor and electrophotographic photoconductor using the same. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, June 13, 2000: US06074792 (9 worldwide citation)

A pigment includes a compound with a tetraazaporphyrin skeleton represented by formula (I): ##STR1## wherein M is a hydrogen atom, or an atom or compound capable of bonding to tetraazaporphyrin through a covalent bond or a coordinate bond; and R.sup.1 to R.sup.8 are each independently a hydrogen ato ...


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Kaoru Tadokoro, Masayuki Shoshi, Michihiko Namba: Electrophotographic photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, August 24, 1999: US05942362 (9 worldwide citation)

An electrophotographic photoconductor has an electroconductive support and a photoconductive layer provided thereon, containing at least one phenol compound of formula (1): ##STR1## wherein R.sup.1 to R.sup.4 and R.sup.11 to R.sup.14 are each independently a hydrogen atom, an alkyl group which may h ...


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Michihiko Namba, Masayuki Shoshi, Kaoru Tadokoro: Electrophotographic photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, May 30, 2000: US06068956 (8 worldwide citation)

An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon which contains as a charge generation material a pigment including a compound with a tetraazaporphyrin skeleton represented by formula (I): ##STR1## wherein M is a hydrogen atom, or an ...