Patents by Inventor Takahisa Nakai

Takahisa Nakai 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).

  • Patent number: 8648557
    Abstract: A drive control signal generating circuit that generates a drive control signal for driving a motor includes an output control circuit that includes a flip-flop in which a state changes by a rotational state signal of the motor crossing a reference value and generates a motor drive control signal according to the state of the flip-flop, a clock generating circuit that generates a clock that defines a time of reading data in the flip-flop of the output control circuit; and a PWM conversion circuit that PWM-converts the drive control signal using the clock as a PWM signal. The clock has a frequency in which the output control circuit operates and has a duty ratio of the PWM signal.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: February 11, 2014
    Assignee: ON Semiconductor Trading, Ltd.
    Inventors: Takashi Ogawa, Takahisa Nakai, Tsutomu Murata
  • Patent number: 8502530
    Abstract: In an offset cancelling circuit of a Hall element, a voltage is applied from four directions and from outside such that a current flowing in the Hall element is switched by 90°, to set a first state through a fourth state, and output voltages of the Hall element in the first state through the fourth state are averaged.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: August 6, 2013
    Assignees: Sanyo Semiconductor Co., Ltd., Semiconductor Components Industries, LLC
    Inventors: Takashi Ogawa, Hironori Terazawa, Takahisa Nakai
  • Publication number: 20120081049
    Abstract: PWM conversion is efficiently executed. An output control circuit comprises a flip-flop which reads crossing of a reference value by a rotational state signal from a motor, and generates a motor drive control signal according to a state of the flip-flop. A clock generator generates a clock which defines a time of reading data in the flip-flop of the output control circuit. A PWM conversion circuit PWM-converts the drive control signal using the clock as a PWM signal.
    Type: Application
    Filed: September 28, 2011
    Publication date: April 5, 2012
    Applicant: ON SEMICONDUCTOR TRADING, LTD.
    Inventors: Takashi Ogawa, Takahisa Nakai, Tsutomu Murata
  • Patent number: 7915022
    Abstract: The present invention relates to a polypeptide having an activity to asymmetrically reduce (3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanone to produce (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol isolated from a microorganism belonging to the genus Ogataea, a DNA encoding the polypeptide and a transformant that produces the polypeptide. The present invention moreover relates to a method of producing (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol utilizing the polypeptide or the transformant. Using the polypeptide or transformant of the present invention, optically active alcohols such as (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol and the like can be produced efficiently.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: March 29, 2011
    Assignee: Kaneka Corporation
    Inventors: Noriyuki Kizaki, Miho Yano, Masashiro Funaki, Teruaki Takesue, Yoshihiko Yasohara, Souichi Morikawa, Takahisa Nakai, Michihiko Kataoka, Sakayu Shimizu
  • Publication number: 20100317075
    Abstract: The present invention relates to a polypeptide having an activity to asymmetrically reduce (3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanone to produce (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol isolated from a microorganism belonging to the genus Ogataea, a DNA encoding the polypeptide and a transformant that produces the polypeptide. The present invention moreover relates to a method of producing (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol utilizing the polypeptide or the transformant. Using the polypeptide or transformant of the present invention, optically active alcohols such as (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol and the like can be produced efficiently.
    Type: Application
    Filed: July 20, 2010
    Publication date: December 16, 2010
    Applicant: KANEKA CORPORATION
    Inventors: NORIYUKI KIZAKI, MIHO YANO, MASAHIRO FUNAKI, TERUAKI TAKESUE, YOSHIHIKO YASOHARA, SOUICHI MORIKAWA, TAKAHISA NAKAI, MICHIHIKO KATAOKA, SAKAYU SHIMIZU
  • Publication number: 20100308801
    Abstract: In an offset cancelling circuit of a Hall element, a voltage is applied from four directions and from outside such that a current flowing in the Hall element is switched by 90°, to set a first state through a fourth state, and output voltages of the Hall element in the first state through the fourth state are averaged.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 9, 2010
    Applicants: SANYO ELECTRIC CO., LTD., SANYO SEMICONDUCTOR CO., LTD.
    Inventors: Takashi OGAWA, Hironori TERAZAWA, Takahisa NAKAI
  • Patent number: 7794993
    Abstract: The present invention relates to a polypeptide having an activity to asymmetrically reduce (3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanone to produce (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol isolated from a microorganism belonging to the genus Ogataea, a DNA encoding the polypeptide and a transformant that produces the polypeptide. The present invention moreover relates to a method of producing (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol utilizing the polypeptide or the transformant. Using the polypeptide or transformant of the present invention, optically active alcohols such as (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol and the like can be produced efficiently.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: September 14, 2010
    Assignee: Kaneka Corporation
    Inventors: Noriyuki Kizaki, Miho Yano, Masahiro Funaki, Teruaki Takesue, Yoshihiko Yasohara, Souichi Morikawa, Takahisa Nakai, Michihiko Kataoka, Sakayu Shimizu
  • Patent number: 7782648
    Abstract: Correction data is written in fuse circuits of q bits. A reading circuit sequentially reads information of the fuse circuits through a selector and writes the information in a storage circuit. Therefore, read data is output from the storage circuit in parallel.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: August 24, 2010
    Assignees: Sanyo Electric Co., Ltd., SANYO Semiconductor Co., Ltd.
    Inventors: Yuichi Matsuo, Takahisa Nakai
  • Publication number: 20090253794
    Abstract: The present invention is a fibroblast activator, collagen production promoter, collagen contraction promoter, hyaluronic acid production promoter, ATP production promoter or melanin formation suppressor, which contains, as an active ingredient, at least one kind of compound selected from the group consisting of conagenin, a conagenin derivative, and a pharmaceutically acceptable salt thereof, as well as a composition (skin external preparation, cosmetic, pharmaceutical product or food, which is a composition for the improvement of wrinkles or a whitening composition) containing such activator, promoter or melanin formation suppressor. According to the present invention, a safe skin external preparation, cosmetic (cosmetic composition), pharmaceutical product or food, which shows a high wrinkle improving effect, can be provided, and a safe skin external preparation, cosmetic (cosmetic composition), pharmaceutical product or food, which shows a high whitening effect can be provided.
    Type: Application
    Filed: July 21, 2006
    Publication date: October 8, 2009
    Inventors: Jun Tomono, Takahisa Nakai, Toshihide Fujii
  • Publication number: 20090209623
    Abstract: Disclosed are: a method for producing an anti-sense nucleic acid which has a wide variation in nucleotide sequences and excellent anti-sense properties at a low cost in a simple manner and in a large scale; and a cosmetic composition or pharmaceutical composition comprising the anti-sense nucleic acid. A method is discovered which can produce a low molecular weight nucleic acid having anti-sense properties from a nucleic acid starting material derived from an organism at a high yield by using a probe nucleic acid having at least a part of the nucleotide sequence of a target gene. An anti-sense nucleic acid produced by using a nucleic acid derived from an organism as a starting material; and a method for producing the anti-sense nucleic acid.
    Type: Application
    Filed: July 24, 2006
    Publication date: August 20, 2009
    Inventors: Jon Tomono, Souichi Morikawa, Takahisa Nakai
  • Publication number: 20090003093
    Abstract: Correction data is written in fuse circuits of q bits. A reading circuit sequentially reads information of the fuse circuits through a selector and writes the information in a storage circuit. Therefore, read data is output from the storage circuit in parallel.
    Type: Application
    Filed: September 28, 2007
    Publication date: January 1, 2009
    Applicants: SANYO ELECTRIC CO., LTD., SANYO SEMICONDUCTOR CO., LTD.
    Inventors: Yuichi Matsuo, Takahisa Nakai
  • Publication number: 20080261281
    Abstract: The present invention relates to a polypeptide having an activity to asymmetrically reduce (3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanone to produce (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol isolated from a microorganism belonging to the genus Ogataea, a DNA encoding the polypeptide and a transformant that produces the polypeptide. The present invention moreover relates to a method of producing (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol utilizing the polypeptide or the transformant. Using the polypeptide or transformant of the present invention, optically active alcohols such as (2R,3S)-1-chloro-3-tert-butoxycarbonylamino-4-phenyl-2-butanol and the like can be produced efficiently.
    Type: Application
    Filed: August 1, 2005
    Publication date: October 23, 2008
    Applicant: Kaneka Corporation
    Inventors: Noriyuki Kizaki, Miho Yano, Masahiro Funaki, Teruaki Takesue, Yoshihiko Yasohara, Souichi Morikawa, Takahisa Nakai, Michihiko Kataoka, Sakayu Shimizu
  • Publication number: 20040248250
    Abstract: An enzyme modifying method for converting the coenzyme-dependency of an oxidoreductase is developed. Using this method, a novel carbonyl reductase mutant capable of utilizing NADH as a coenzyme is provided. It is also intended to provide a process for enzymatically producing an optically active (S)-4-halo-3-hydroxybutyric ester by utilizing the carbonyl reductase mutant.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 9, 2004
    Inventors: Takahisa Nakai, Souichi Morikawa, Noriyuki Kizaki, Yoshihiko Yasohara
  • Publication number: 20030236629
    Abstract: The present invention provides a method for calculating an optimized solution of the amino acid sequences of multiple-mutated proteins. The method comprises searching the three-dimensional structural coordinates of amino acid side chains of the amino acid sequences of members of a multiple-mutated protein population based on the three-dimensional structure data of a template protein population using a dead end elimination algorithm, and executing structural energy minimization calculations for the members, thereby calculating the three-dimensional structural coordinates of an optimum multiple-mutated protein, calculating a characteristic value from the three-dimensional structural coordinates of the optimum multiple-mutated protein, and applying a genetic algorithm to the multiple-mutated protein population to calculate the members which optimize the characteristic value.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 25, 2003
    Applicant: KANEKA CORPORATION
    Inventors: Souichi Morikawa, Takahisa Nakai, Kiyoto Ishii
  • Patent number: 6133431
    Abstract: An adsorbent that exhibits a high specificity in adsorbing immunoglobulins and/or complexes thereof, is extremely reduced in the lowering of the adsorption characteristic during sterilization or storage, is highly stable and safe, and is prepared by immobilizing on a water-insoluble support either a peptide derivative which has undergone at least one of the deletion, substitution, insertion, or addition of amino acids in a peptide having a specified amino acid sequence or an amino acid sequence, or the above peptide derivative which has undergone the addition of Lyn or Cys at the amino and/or carboxyl terminal thereof; a device for adsorption and removal made by packing the adsorbent in a vessel equipped with effluent preventing means; and a method of adsorbing and removing immunoglobulins and/or complexes thereof contained in the blood, plasma or other body fluids with the adsorbent.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: October 17, 2000
    Assignee: Kaneka Corporation
    Inventors: Takamune Yasuda, Osamu Odawara, Eiji Ogino, Michio Nomura, Takahisa Nakai, Takashi Asahi, Nobutaka Tani