Patents by Inventor Masahiro Katayama

Masahiro Katayama 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).

  • Publication number: 20050018461
    Abstract: Inputs of a control circuit are connected to a terminal to which an external operation control signal is supplied and a terminal to which a timing signal used exclusively for testing is supplied, and the control circuit is made controllable such that, in a test mode, a state of an internal operation control signal is changed in response to a change of a state of the external operation control signal, and the internal operation control signal is changed in response to the timing exclusively used for testing, whereas, in a normal operation mode, the state of the internal operation control signal is changed in response to the change of the state of the external operation control signal, and the internal operation control signal is changed in response to the change of the external operation control signal.
    Type: Application
    Filed: August 16, 2004
    Publication date: January 27, 2005
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka, Hiroshi Akasaki, Masahiro Katayama
  • Patent number: 6841713
    Abstract: The invention relates to economical and efficient methods for producing 2-methylene-3-methylbicyclo[2,2,1]heptane, 2,3-dimethylbicyclo[2.2.1]hept-2-ene and the like that are useful for materials of producing base oil of traction drive fluid for traction drive lubricating oil. The methods comprise reacting one or more C3-4 acyclic olefins with cyclopentadiene and isomerizing the resulting bicyclo[2.2.1]heptene derivatives in the presence of an isomerization catalyst to give one or more bicyclo[2.2.1]heptane derivatives.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: January 11, 2005
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Toshiyuki Tsubouchi, Yukio Yoshida, Motohisa Ido, Masahiro Katayama
  • Patent number: 6794678
    Abstract: Inputs of a control circuit are connected to a terminal to which an external operation control signal is supplied and a terminal to which a timing signal used exclusively for testing is supplied, and the control circuit is made controllable such that, in a test mode, a state of an internal operation control signal is changed in response to a change of a state of the external operation control signal, and the internal operation control signal is changed in response to the timing exclusively used for testing, whereas, in a normal operation mode, the state of the internal operation control signal is changed in response to the change of the state of the external operation control signal, and the internal operation control signal is changed in response to the change of the external operation control signal.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: September 21, 2004
    Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka, Hiroshi Akasaki, Masahiro Katayama
  • Publication number: 20030192519
    Abstract: An external connection terminal connector as a separate part that mounts the igniter is abolished, and the external connection terminal is integrated with the igniter itself. The igniter has the electronic components mounted on an internal wiring substrate, and the electronic components within the igniter and the external connection terminal are directly connected by wire bonding.
    Type: Application
    Filed: February 6, 2003
    Publication date: October 16, 2003
    Applicant: Diamond Electric Mfg. Co., Ltd.
    Inventors: Masahiro Katayama, Tsuyoshi Yamaguchi, Kazuhiko Okamura, Kouji Hiragi, Kounosuke Inamura
  • Patent number: 6601623
    Abstract: As shown in FIGS. 1 and 2, in a pneumatic tire of the present invention, block-shaped land portions 18 are divided by main grooves 14 and lug grooves 16 on the tread 12 of a studless tire 10 and a plurality of transverse sipings 20 is formed on each of the block-shaped land portions 18. Each sipings 20 is formed from a first linear portion 20A, a second linear portion 20B, and a sloping line portion 20C. The first linear portion 20A essentially extends in a direction perpendicular to the surface 18A of the block-shaped land portion 18 and contacts the surface 18A, the second linear portion 20B essentially extends in a direction perpendicular to the surface 18A and is separated from the surface 18A, and the sloping line portion 20C inclines to connect the ends of the first linear portion 20A and the second linear portion 20B. In each of the sipings 20, the position D1 of the sloping line portion 20C is set to 10% to 60% of the siping depth D.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: August 5, 2003
    Assignee: Bridgestone Corporation
    Inventor: Masahiro Katayama
  • Patent number: 6570800
    Abstract: The column address strobe signal (CAS) which is changed in cycles as many as a plurality of times that of a clock signal cycle is input to the memory block (MBK0 to MBKn). A plurality of serial data readout from the memory cell array (10) and parallel/serial converted by a parallel/serial converter circuit (21) in synchronism with a clock signal cycle are output for every cycle when the column address signal (CASADR) is changed. Parallel data input to the memory block and serial/parallel converted by a serial/parallel converter circuit (25) in synchronism with the clock signal cycle are written in the memory cell array. In this way, the access specification that the column address strobe signal is varied once per n cycles of the clock signal allows for a more rapid memory operation.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: May 27, 2003
    Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Yousuke Tanaka, Masahiro Katayama, Yuji Yokoyama, Hiroshi Akasaki, Shuichi Miyaoka, Toru Kobayashi
  • Patent number: 6531534
    Abstract: The present invention provides a thermoplastic resin composition which has a high resistance to hydrolysis in a molded article thereof. That is, it provides a thermoplastic resin composition which contains 100 parts by weight of (a) a polycarbonate resin or, if necessary, a mixture of (a) with (b) a styrene resin, 1 to 40 parts by weight of (c) an organic phosphorus compound and 0.1 to 5 parts by weight of (e) talc, and further contains 0.05 to 5 parts by weight of (d) fluoroethylene polymer if necessary.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: March 11, 2003
    Assignee: Daicel Chemical Industries, Ltd.
    Inventor: Masahiro Katayama
  • Publication number: 20030045762
    Abstract: The invention relates to economical and efficient methods for producing 2-methylene-3-methylbicyclo[2,2,1]heptane, 2,3-dimethylbicyclo[2.2.1]hept-2-ene and the like that are useful for materials of producing base oil of traction drive fluid for traction drive lubricating oil. The methods comprise reacting one or more C3-4 acyclic olefins with cyclopentadiene and isomerizing the resulting bicyclo[2.2.1]heptene derivatives in the presence of an isomerization catalyst to give one or more bicyclo[2.2.1]heptane derivatives.
    Type: Application
    Filed: July 25, 2002
    Publication date: March 6, 2003
    Inventors: Toshiyuki Tsubouchi, Yukio Yoshida, Motohisa Ido, Masahiro Katayama
  • Publication number: 20020188045
    Abstract: The present invention aims at modifying a polyblend mainly comprising a polycarbonate resin and a polystyrene resin into a thermoplastic resin composition having flowability and impact strength equivalent to those of a polyblend comprising a polycarbonate resin and an ABS resin, and at providing a harmless flame-retardant thermoplastic resin composition based on the resulting modified composition. Specifically, the present invention relates to a thermoplastic resin comprising 100 parts by weight of a resin mixture comprising 30 to 95% by weight of a polycarbonate resin (a), 5 to 70% by weight of a polystyrene resin (b), 0.5 to 20 parts by weight of a specific block copolymer (c) and, if necessary, 0.1 to 20 parts by weight of a polyalkylene terephthalate (d), and/or 0.1 to 20 parts by weight of a polyphenylene ether resin (e), and a flame-retardant thermoplastic resin composition prepared by blending the above composition with 1 to 40 parts by weight of an organophosphorus compound (f) and, if necessary, 0.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 12, 2002
    Applicant: DAICEL CHEMICAL INDUSTRIES, LTD.
    Inventors: Masahiro Katayama, Hiromitsu Hamano
  • Publication number: 20020118018
    Abstract: Inputs of a control circuit are connected to a terminal to which an external operation control signal is supplied and a terminal to which a timing signal used exclusively for testing is supplied, and the control circuit is made controllable such that, in a test mode, a state of an internal operation control signal is changed in response to a change of a state of the external operation control signal, and the internal operation control signal is changed in response to the timing exclusively used for testing, whereas, in a normal operation mode, the state of the internal operation control signal is changed in response to the change of the state of the external operation control signal, and the internal operation control signal is changed in response to the change of the external operation control signal.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 29, 2002
    Inventors: Masatoshi Hasegawa, Shuichi Miyaoka, Hiroshi Akasaki, Masahiro Katayama
  • Patent number: 6427737
    Abstract: A pneumatic tire comprising a tread which comprises block-shaped land portions and a plurality of specific sipes formed on the block-shaped land portions is disclosed. At least in one portion in the direction of the depth of the sipe, the sipe has an amplitude in the direction of the width of the sipe and extends in the transverse direction of the tire, and at least one portion of each sipe in the direction of the depth of the sipe is disposed at an offset position relative to an other portion of the sipe in a circumferential direction of the tire. The amplitude of the sipe in the present invention may change in the direction of the depth and the change may alternate from an increase to a decrease or from a decrease to an increase at one or a plurality of node positions disposed in the sipe in the direction of the depth of the sipe.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: August 6, 2002
    Assignee: Bridgestone Corporation
    Inventor: Masahiro Katayama
  • Patent number: 6417257
    Abstract: The present invention relates to a thermoplastic resin comprising 100 parts by weight of a resin mixture comprising 30 to 95% by weight of a polycarbonate resin (a), 5 to 70% by weight of a polystyrene resin (b), 0.5 to 20 parts by weight of a specific block copolymer (c) and, if necessary, 0.1 to 20 parts by weight of a polyalkylene terephthalate (d), and/or 0.1 to 20 parts by weight of a polyphenylene ether resin (e), and a flame-retardant thermoplastic resin composition prepared by blending the above composition with 1 to 40 parts by weight of an organophosphorus compound (f) and, if necessary, 0.05 to 5 parts by weight of a fluoroethylene polymer (g).
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: July 9, 2002
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiro Katayama, Hiromitsu Hamano
  • Patent number: 6380287
    Abstract: The present invention aims at modifying a polyblend mainly comprising a polycarbdnate resin and a polystyrene resin into a thermoplastic resin composition having flowability and impact strength equivalent to those of a polyblend comprising a polycarbonate resin and an ABS resin, and at providing a harmless flame-retardant thermoplastic resin composition based-on the resulting modified composition. Specifically, the present invention relates to a thermoplastic resin comprising 100 parts by weight of a-resin mixture comprising 30 to 95% by weight of a polycarbonate resin (a), 5 to 70% by weight of a polystyrene resin (b), 0.5 to 20 parts by weight of a specific block copolymer (c) and, if necessary, 0.1 to 20 parts by weight of a polyalkylene terephthalate (d), and/or 0.1 to 20 parts by weight of a polyphenylene ether resin (e), and a flame-retardant thermoplastic resin composition prepared by blending the above composition with 1 to 40 parts by weight of an organophosphorus compound (f) and, if necessary, 0.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: April 30, 2002
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiro Katayama, Hiromitsu Hamano
  • Patent number: 6316579
    Abstract: A thermoplastic resin composition can be obtained by adding about 0.1 to 20 parts by weight of a diene-series block copolymer (2) to 100 parts by weight of a resin composition containing a polycarbonate-series resin (1) as a basic component of which the proportion of terminal hydroxy groups relative to the whole of the terminals is 1 mole % or above (about 5 to 40 mole %). The polycarbonate-series resin base may further comprise a thermoplastic resin composition (3) such as a rubber-modified styrenic resin. The block copolymer component (2) includes an epoxy-modified block copolymer, etc. When added an organophosphorus compound as a flame retardant (4), or a fluorine-containing resin as a flame-retartant auxiliary (5), a halogen-free flame-retardant thermoplastic resin composition can be obtained. A thermoplastic resin with an improved flowability and impact strength can be obtained by modifying a polymer blend of the polycarbonate-series resin and the styrenic-series resin in quality.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: November 13, 2001
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiro Katayama, Masaaki Ito, Yoshihiro Otsuka
  • Publication number: 20010007539
    Abstract: The column address strobe signal (CAS) which is changed in cycles as many as a plurality of times of a clock signal cycle is input to the memory block (MBK0 to MBKn). A plurality of serial data readout from the memory cell array (10) and parallel/serial converted by a parallel/serial converter circuit (21) in synchronous with a clock signal cycle are output for every cycle when the column address signal (CASADR) is changed. Parallel data input to the memory block and serial/parallel converted by a serial/parallel converter circuit (25) in synchronous with the clock signal cycle are written in the memory cell array. In this way, the access specification that the column address strobe signal is varied once per n cycles of the clock signal allows more rapid memory operation.
    Type: Application
    Filed: January 10, 2001
    Publication date: July 12, 2001
    Inventors: Yousuke Tanaka, Masahiro Katayama, Yuji Yokoyama, Hiroshi Akasaki, Shuichi Miyaoka, Toru Kobayashi
  • Patent number: 6111016
    Abstract: A thermoplastic resin composition can be obtained by adding about 0.1 to 20 parts by weight of a diene-series block copolymer (2) to 100 parts by weight of a resin composition containing a polycarbonate-series resin (1) as a basic component of which the proportion of terminal hydroxy groups relative to the whole of the terminals is 1 mole % or above (about 5 to 40 mole %). The polycarbonate-series resin base may further comprise a thermoplastic resin composition (3) such as a rubber-modified styrenic resin. The block copolymer component (2) includes an epoxy-modified block copolymer, etc. When added an organophosphorus compound as a flame retardant (4), or a fluorine-containing resin as a flame-retartant auxiliary (5), a halogen-free flame-retardant thermoplastic resin composition can be obtained. A thermoplastic resin with an improved flowability and impact strength can be obtained by modifying a polymer blend of the polycarbonate-series resin and the styrenic-series resin in quality.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: August 29, 2000
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiro Katayama, Masaaki Ito, Yoshihiro Otsuka
  • Patent number: 6066686
    Abstract: The present invention relates to a thermoplastic resin comprising 100 parts by weight of a resin mixture comprising 30 to 95% by weight of a polycarbonate resin (a), 5 to 70% by weight of a polystyrene resin (b), 0.5 to 20 parts by weight of a specific block copolymer (c) and, if necessary, 0.1 to 20 parts by weight of a polyalkylene terephthalate (d), and/or 0.1 to 20 parts by weight of a polyphenylene ether resin (e), and a flame-retardant thermoplastic resin composition prepared by blending the above composition with 1 to 40 parts by weight of an organophosphorus compound (f) and, if necessary, 0.05 to 5 parts by weight of a fluoroethylene polymer (g).
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: May 23, 2000
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masahiro Katayama, Hiromitsu Hamano
  • Patent number: 5598372
    Abstract: A semiconductor memory incorporating an operation circuit for carrying out logical operations on data and arithmetic operations on address signals. The memory is arranged functionally so that the data representing the result of each of such operations is written to a memory array while also being output through an external terminal in the same memory cycle.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: January 28, 1997
    Assignees: Hitachi, Ltd., Hitachi ULSI Engineering Corp.
    Inventors: Miki Matsumoto, Kanji Oishi, Masahiro Katayama, Kazufumi Watanabe
  • Patent number: 5598373
    Abstract: A defect remedy LSI mounted on a memory module, comprising: an input interface portion for capturing address and control signals, the input interface portion being the same as that of a dynamic RAM; an input/output interface portion corresponding to a data bus of a memory device comprised of a plurality of dynamic random access memories; a memory circuit to which a chip address and an X defective address of any of the plurality of random access memories are electrically written, the memory circuit being substantially made nonvolatile; a redundancy remedy RAM portion composed of a static RAM wherein a word line is selected by a compare match signal between an X address signal and the defective address of the memory circuit, the X address signal and the defective address being captured via the input interface portion, and a column is selected by a Y address signal captured via the input interface portion; a selecting portion for connecting a data input/output bus of the redundancy remedy RAM portion to an input
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 28, 1997
    Assignees: Hitachi, Ltd., Hitachi ULSI Engineering Corp.
    Inventors: Shoji Wada, Kanehide Kenmizaki, Masaya Muranaka, Masahiro Ogata, Hidetomo Aoyagi, Tetsuya Kitame, Masahiro Katayama, Shoji Kubono, Yukihide Suzuki, Makoto Morino, Sinichi Miyatake, Seiichi Shundo, Yoshihisa Koyama, Nobuhiko Ohno
  • Patent number: 4441417
    Abstract: A fixing device for use in an image formation apparatus such as an electrophotographic copying apparatus or recording apparatus, and more particularly a fixing device in which a sheet such as paper having a toner image on the surface thereof is passed between a pair of rotatable members pressed against each other to thereby fix the toner image on the sheet. In the substance forming the surface of at least one of the pair of rotatable members, particles having a hardness higher than that of said substance are dispersed to enhance the fixativeness.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: April 10, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Katayama, Nobutoshi Yoshida, Tsukasa Kuge