Patents by Inventor Takaharu Nakamura
Takaharu Nakamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5441253Abstract: A paper sheet conveying apparatus, a paper sheet separator comprising a conveyer belt (24) movable in a paper sheet delivering direction at all times, a drive roller (42) rotating in one direction, and a separator roller (41) disposed between the drive roller (42) and the conveyer belt (24) so as to come into engagement with either one of the drive roller (42) or the conveyer belt (24) exclusively while maintaining a predetermined gap from the other so that a paper sheet on the conveyer belt (24) is moved back toward the upstream side when the separator roller (41) comes into engagement with the drive roller (42). The drive roller (42) is supported by a pivotable support arm (44) operatively connected for adjusting the predetermined gap.Type: GrantFiled: December 20, 1993Date of Patent: August 15, 1995Assignee: Kabushiki Kaisha Ace DenkenInventors: Takatoshi Takemoto, Kazunari Kawashima, Hideyuki Kadomatsu, Moriyuki Aoyama, Takaharu Nakamura
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Patent number: 5424318Abstract: A novel piperidine derivative is defined by the formula (I), including a salt thereof, ##STR1## wherein R.sup.1 denotes anthraquinone, X denotes a group of the formula --(CH.sub.2).sub.n --, a group of the formula --O(CH.sub.2).sub.n --, a group of the formula --S(CH.sub.2).sub.n --, a group of the formula --NH(CH.sub.2).sub.n --, a group of the formula --SO.sub.2 NH(CH.sub.2).sub.n --, a group of the formula ##STR2## a group of the formula ##STR3## a group of the formula ##STR4## a group of the formula --CH.sub.2 NH(CH.sub.2).sub.n --, a group of the formula ##STR5## (in all the above formulas, n is an integer of 1 through 7 and R.sup.3 represents a lower alkyl group or a benzyl group), a group of the formula ##STR6## a group of the formula ##STR7## a group of the formula --O--CH.sub.2 CH.sub.2 CH.dbd.Type: GrantFiled: January 5, 1994Date of Patent: June 13, 1995Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 5306720Abstract: A novel piperidine derivative is defined by the formula (I), including a salt thereof, ##STR1## wherein R.sup.1 denotes a univalent group derived from substituted or unsubstituted quinazolinedione,X denotes a group of the formula ##STR2## n is an integer of 1 through 7, the ring A denotes a group of the formula ##STR3## a group of the formula ##STR4## or a group of the formula ##STR5## and R.sup.2 denotes a hydrogen atom, a lower alkyl group, a substituted benzoyl group, a pyridyl group, a 2-hydroxyethyl group, a pyridylmethyl group, or a group of the formula ##STR6## wherein Z represents a halogen atom). The novel compounds of this invention are used for treating dementias and sequelae of cerebrovascular diseases.Type: GrantFiled: December 20, 1991Date of Patent: April 26, 1994Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 5196439Abstract: A cyclic amine is defined by the formula: ##STR1## in which A is naphthyl, phenyl, quinolyl or alkyl, X is a group containing carbonyl, n is 2 or 3 and B is alkyl, halogen, phenyl or --YZ, Y being --O--, --CO-- or --NH--, Z being phenyl, naphthyl, pyridyl, alkyl or cycloalkyl. It is useful to treat mental symptoms associated with a cerebrovascular disease.Type: GrantFiled: January 24, 1992Date of Patent: March 23, 1993Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Norio Karibe, Isao Saito, Kunizo Higurashi, Masahiro Yonaga, Takeru Kaneko, Takahiro Nakazawa, Masataka Ueno, Kiyomi Yamatsu, Kohshi Ueno, Masuhiro Ikeda
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Patent number: 5166082Abstract: This invention provides devices each of which has at least one bipolar transistor and at least one MOS transistor, both formed on a substrate. This invention also provides their fabrication process. Each device is constructed of epitaxial layers of a first and second conductivity types, surfaces of said epitaxial layers being partly exposed, at least one MOS transistor formed in the epitaxial layer of the first conductivity type, and at least one bipolar transistor formed in the epitaxial layer of the second conductivity type. Its fabrication process comprises the steps of forming the epitaxial layer of the second conductivity type on the semiconductor substrate, forming the epitaxial layer of the first conductivity type on a part of the epitaxial layer of the second conductivity type, forming the bipolar transistor in the epitaxial layer of the second conductivity type and then forming the MOS transistor in the epitaxial layer of the first conductivity type.Type: GrantFiled: June 10, 1991Date of Patent: November 24, 1992Assignee: Oki Electric Industry Co., Ltd.Inventors: Takaharu Nakamura, Toshikazu Kuroda, Tatsuya Kimura
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Patent number: 5151417Abstract: 3-Substituted vinyl cephalosporin derivatives represented by the following formula: ##STR1## wherein R.sup.1 represents a hydroxyl or lower alkoxyl group, X represents a nitrogen atom or a group represented by the formula --CH.dbd., R.sup.2 represents a carboxyl group or a carboxyl group protected with a protecting group, and R.sup.3 is as defined herein, and pharmaceutically acceptable salts thereof are potent antibacterial agents. Processes for their preparation, intermediates in such processes, and antibacterial compositions containing them as active ingredients are also described.Type: GrantFiled: July 10, 1990Date of Patent: September 29, 1992Assignee: Eisai Co., Ltd.Inventors: Manabu Sasho, Hiroshi Yamauchi, Motosuke Yamanaka, Takaharu Nakamura, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Shigeto Negi
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Patent number: 5128465Abstract: A cephem derivative represented by the following formula: ##STR1## wherein R.sub.1 means a fluorine-substituted lower alkyl and A.sub.1 denotes a cyclic or acyclic ammonio group, or a non-toxic salt thereof, is prepared by reacting a compound represented by the following formula: ##STR2## wherein A.sub.1 has the same meaning as defined above, with another compound represented by the following formula: ##STR3## wherein R.sub.1 has the same meaning as defined above, and if necessary, removing the protecting groups.Type: GrantFiled: January 22, 1990Date of Patent: July 7, 1992Assignee: Eisai Co., Ltd.Inventors: Takashi Kamiya, Toshihiko Naito, Yuuki Komatu, Yasunobu Kai, Takaharu Nakamura, Manabu Sasho, Shigeto Negi, Isao Sugiyama, Kanemasa Katsu, Hiroshi Yamauchi
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Patent number: 5118684Abstract: A novel piperidine derivative is defined by the formula (I), including a slt thereof, ##STR1## wherein R.sup.1 denotes a univalent group derived from one selected among substituted or unsubstituted benzene, pyridine, pyrazine, indole, anthraquinone, quinoline, substituted or unsubstituted phthalimide, homophthalimide, pyridinecarboxylic acid imide, pyridine N-oxide, pyrazinedicarboxylic acid imide, naphthalenedicarboxylic acid imide, substituted or unsubstituted quinazolinedione, 1,8-naphthalimide, bicyclo [2.2.2] oct-5-ene-2,3-dicarboxylic acid imide and pyromerylimide,X denotes a group of the formula --(CH.sub.2).sub.n --, a group of the formula --O(CH.sub.2).sub.n --, a group of the formula --S(CH.sub.2).sub.n --, a group of the formula --NH(CH.sub.2).sub.n --, a group of the formula --SO.sub.2 NH(CH.sub.2).sub.n --, a group of the formula ##STR2## a group of the formula ##STR3## a group of the formula ##STR4## a group of the formula --CH.sub.2 NH(CH.sub.2).sub.Type: GrantFiled: April 3, 1991Date of Patent: June 2, 1992Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 5102895Abstract: The novel vitamin E derivative provides an excellent antihyperlipemic effect and is defined by the formula (I): ##STR1## wherein R represents a nicotinoyl group; and m is an integer of from 2 to 5 while n is an integer of from 3 to 6, provided that n is larger than m.Type: GrantFiled: December 31, 1990Date of Patent: April 7, 1992Assignee: Eisai Co., Ltd.Inventors: Noriyasu Hirose, Kimio Hamamura, Takaharu Nakamura, Kiiti Ema, Takashi Banba, Tetsuya Nakamura, Hidetoshi Kawashima, Yuuichi Inai, Noritoshi Sano, Yuko Miyauchi, Shizumasa Kijima
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Patent number: 5089491Abstract: A 3-propenylcephem derivative of the following formula: ##STR1## wherein R.sub.1 represents a fluoro-substituted lower alkyl group or a cyano-substituted lower alkyl group, and A represents a cyclic or an acylic ammonio group, or a pharmaceutically acceptable salt thereof, exhibiting excellent anti-bacterial activities against both Gram-positive bacteria and Gram-negative bacteria; Process for the preparation thereof; Anti-bacterial composition; Intermediate for the 3-propenylcephem derivative; and Process for the preparation of the intermediate.Type: GrantFiled: January 11, 1990Date of Patent: February 18, 1992Assignee: Eisai Co., Ltd.Inventors: Takashi Kamiya, Toshihiko Naito, Shigeto Negi, Yuuki Komatu, Yasunobu Kai, Takaharu Nakamura, Isao Sugiyama, Yoshimasa Machida, Seiichiro Nomoto, Kyosuke Kitoh, Kanemasa Katsu, Hiroshi Yamauchi
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Patent number: 5039681Abstract: A novel piperidine derivative is defined by the formula (I), including a salt thereof, ##STR1## wherein R.sup.1 denotes a univalent group derived from one selected among substituted or unsubstituted benzene, pyridine, pyrazine, indole, anthraquinone, quinoline, substituted or unsubstituted phthalimide, homophthalimide, pyridinecarboxylic acid imide, pyridine N-oxide, pyrazinedicarboxylic acid imide, naphthalenedicarboxylic acid imide, substituted or unsubstituted quinazolinedione, 1,8-naphthalimide, bicyclo [2.2.2] oct-5-ene-2,3-dicarboxylic acid imide and pyromerylimide,X denotes a group of the formula --(CH.sub.2).sub.n --, a group of the formula --O(CH.sub.2).sub.n --, a group of the formula --S(CH.sub.2).sub.n --, a group of the formula --NH(CH.sub.2).sub.n --, a group of the formula --SO.sub.2 NH(CH.sub.2).sub.n --, a group of the formula ##STR2## a group of the formula ##STR3## a group of the formula ##STR4## a group of the formula --CH.sub.2 NH(CH.sub.2).sub.Type: GrantFiled: February 14, 1990Date of Patent: August 13, 1991Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 5006649Abstract: A 3-propenylcephem derivative of the following formula: ##STR1## wherein R.sub.1 represents a fluoro-substituted lower alkyl group or a cyano-substituted lower alkyl group, and A represents a cyclic or an acylic ammonio group, or a pharmaceutically acceptable salt thereof, exhibiting excellent anti-bacterial activities against both Gram-positive bacteria and Gram-negative bacteria; Process for the preparation thereof; Anti-bacterial composition; Intermediate for the 3-propenylcephem derivative; and Process for the preparation of the intermediate.Type: GrantFiled: January 11, 1990Date of Patent: April 9, 1991Assignee: Eisai, Co.Inventors: Takashi Kamiya, Toshihiko Naito, Shigeto Negi, Yuuki Komatu, Yasunobu Kai, Takaharu Nakamura, Isao Sugiyama, Yoshimasa Machida, Seiichiro Nomoto, Kyosuke Kitoh, Kanemasa Katsu, Hiroshi Yamauchi
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Patent number: 4942169Abstract: A novel piperidine derivative is defined by the formula (I), including a salt thereof, ##STR1## wherein R.sup.1 denotes a univalent group derived from one selected among substituted or unsubstituted benzene, pyridine, pyrazine, indole, anthraquinone, quinoline, substituted or unsubstituted phthalimide, homophthalimide, pyridinecarboxylic acid imide, pyridine N-oxide, pyrazinedicarboxylic acid imide, naphthalenedicarboxylic acid imide, substituted or unsubstituted quinazolinedione, 1,8-naphthalimide, bicyclo [2.2.2.] oct-5-ene-2,3-dicarboxylic acid imide and pyromerylimide,X denotes a group of the formula --(CH.sub.2).sub.n --, a group of the formula --O(CH.sub.2).sub.n --, a group of the formula --S(CH.sub.2).sub.n --, a group of the formula --NH(CH.sub.2).sub.n --, a group of the formula --SO.sub.2 NH(CH.sub.2).sub.n --, a group of the formula ##STR2## a group of the formula ##STR3## a group of the formula ##STR4## a group of the formula --CH.sub.2 NH(CH.sub.2).sub.Type: GrantFiled: March 10, 1989Date of Patent: July 17, 1990Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 4929612Abstract: Novel thiadiazolylacetamide cephem derivatives of the following formula are described. ##STR1## wherein A represents a quaternary ammonio group; or a pharmaceutically acceptable salt thereof. These novel compounds are useful as antibacterial agents, because they have a broad antibacterial spectrum ranging from gram-negative bacteria to gram-positive bacteria. Processes for the preparation of these novel compounds are also described.Type: GrantFiled: April 14, 1988Date of Patent: May 29, 1990Assignee: Eisai Co., Ltd.Inventors: Yoshimasa Machida, Shigeto Negi, Takashi Kamiya, Yuuki Komatu, Isao Sugiyama, Yasunobu Kai, Takaharu Nakamura, Toshihiko Naito, Kyosuke Kitoh, Kanemasa Katsu, Hiroshi Yamauchi
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Patent number: 4921863Abstract: Cyclic amine derivatives of the formula: ##STR1## or the pharmacologically acceptable salts thereof, wherein the symbols are as defined in the specification, as effective in relieving, curing or preventing mental symptoms due to cerebral vascular disorders.Type: GrantFiled: February 17, 1988Date of Patent: May 1, 1990Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Norio Karibe, Isao Saito, Kunizou Higurashi, Masahiro Yonaga, Takeru Kaneko, Takahiro Nakazawa, Masataka Ueno, Kiyomi Yamatsu
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Patent number: 4921850Abstract: A 3-propenylcephem derivative of the following formula: ##STR1## wherein R.sub.1 represents a fluoro-substituted lower alkyl group or a cyano-substituted lower alkyl group, and A represents a cyclic or an acylic ammonio group, or a pharmaceutically acceptable salt thereof, exhibiting excellent anti-bacterial activities against both Gram-positive bacteria and Gram-negative bacteria; Process for the preparation thereof; Anti-bacterial composition; Intermediate for the 3-propenylcephem derivative; and Process for the preparation of the intermediate.Type: GrantFiled: October 13, 1987Date of Patent: May 1, 1990Assignee: Eisai Co., Ltd.Inventors: Takashi Kamiya, Toshihiko Naito, Shigeto Negi, Yuuki Komatu, Yasunobu Kai, Takaharu Nakamura, Isao Sugiyama, Yoshimasa Machida, Seiichiro Nomoto, Kyosuke Kitoh, Kanemasa Katsu, Hiroshi Yamauchi
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Patent number: 4903257Abstract: A digital two-way radio communication system including first and second radio stations. Each radio station includes an antenna, a data transmission unit, a data reception unit, and a switching circuit. Both radio stations are radio-connected by a single frequency. When a first data transmission unit transmits data to the second radio station, a first switching circuit in the first radio station forms a transmission path between the first data transmission unit and a first antenna, and a second switching circuit in the second radio station forms a reception path between a second antenna and a second data reception unit in the second radio station, or vice versa.Type: GrantFiled: May 27, 1988Date of Patent: February 20, 1990Assignee: Fujitsu LimitedInventors: Yukio Takeda, Takeshi Takano, Yoshiaki Kaneko, Akihiko Kimura, Takaharu Nakamura
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Patent number: 4870659Abstract: An FSK demodulation circuit which receives as input an FSK modulated reception signal, obtains two quadrature pulse trains, i.e., a first pulse train and a second pulse train, from a phase detection circuit, is provided with at least two sampling means which use the edge of one of the pulse trains and sample the logic of the other pulse train, produces two or more sample outputs at different timings, and determines the logic of the reproduced data from a combination of the logics "1" and "0" of the sample outputs.Type: GrantFiled: August 29, 1988Date of Patent: September 26, 1989Assignee: Fujitsu LimitedInventors: Yasuyuki Oishi, Takeshi Takano, Takaharu Nakamura, Yukio Takeda, Yasunobu Watanabe
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Patent number: 4849431Abstract: A novel piperidine derivative or a pharmacologically acceptable salt thereof is used in the treatment and prevention of dementias and sequelae of cerebrovascular diseases. These compounds also exhibit strong, highly selective anticholinesterase activity and may be orally or parenterally administered.Type: GrantFiled: December 24, 1986Date of Patent: July 18, 1989Assignee: Eisai Co., Ltd.Inventors: Hachiro Sugimoto, Takaharu Nakamura, Yutaka Tsuchiya, Hiroyuki Sugumi, Kunizou Higurashi, Norio Karibe, Yoshiharu Yamanishi, Hiroo Ogura, Shin Araki, Atsuhiko Kubota, Michiko Ohtake, Kiyomi Tamatsu
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Patent number: 4625180Abstract: A frequency synthesizer having an intermittently operated PLL circuit in which power is intermittently applied to a prescaler to reduce power consumption. The PLL circuit is operated such that fluctuations in the frequency synthesizer output frequency do not occur. This stability in the output frequency results from selectively providing signals to the phase comparator within the PLL circuit only during a time period beginning after power is applied to the prescaler and ending before power is removed from the prescaler.Type: GrantFiled: December 24, 1985Date of Patent: November 25, 1986Assignee: Fujitsu LimitedInventors: Eiji Itaya, Takeshi Takano, Takaharu Nakamura