Patents by Inventor Takahiro Seki

Takahiro Seki 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: 20020190283
    Abstract: A power supply voltage control apparatus including an input signal generation circuit of wide uses or a small-sized monitor circuit of a novel configuration, and a semiconductor circuit and a method for driving the same, having a semiconductor circuit 11, an input signal generation circuit 12 able to change the phase difference i of a reference signal out&phgr;i and an input signal out&phgr;0 in accordance with a control signal Si when generating the two signals from a clock, a monitor circuit 13 having a characteristic between a power supply voltage and delay the same as that of a critical path of the semiconductor circuit 11, propagating the input signal out&phgr;0, and outputting a delayed signal out&phgr;0′ to be delayed exactly by a time equivalent to a delay of the critical path (or smaller by a constant ratio), a delay detection circuit 14 for detecting a delay of the delayed signal out&phgr;0′ relative to the reference signal out&phgr;i, and a power supply voltage control circuit 15 for co
    Type: Application
    Filed: April 23, 2002
    Publication date: December 19, 2002
    Inventors: Katsunori Seno, Akihiko Hashiguchi, Tetsuo Kondo, Takahiro Seki
  • Patent number: 6414527
    Abstract: A semiconductor device provided with a replica circuit functioning as an equivalent circuit to that of a path configuration selected as a critical path in the semiconductor circuit and an adjustable delay device for example between an output side of the replica circuit and a phase comparator, the delay value of the delay device being adjustable after production of the chip to a value enabling the replica system including the replica circuit to reliably operate with a margin from the critical path delay of the semiconductor circuit, whereby it becomes possible to prevent setting of an excessive margin and becomes possible to increase the margin when the margin ends up smaller than expected and therefore it becomes possible to flexibly and efficiently configure the replica circuit, and a method of constitution of the same.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: July 2, 2002
    Assignee: Sony Corporation
    Inventors: Katsunori Seno, Takahiro Seki, Tetsuo Kondo
  • Patent number: 6313622
    Abstract: A power source voltage controller which can set the optimal margin for a replica circuit and shorten the time for the power source voltage to converge to the optimal value, having a replica circuit for monitoring a delay time of a critical path by propagating a reference signal having a power source voltage-delay characteristic approximately equivalent to a critical path in a semiconductor circuit, a phase difference detection circuit and an encoder receiving a delay signal by the replica circuit and the reference signal and detecting the phase difference of the delay signal from the reference signal and outputting the detection result as phase difference information, voltage control circuits for generating a power source voltage of a value based on a phase difference information signal and supplying it to the semiconductor circuit and the replica circuit, and a delay error correction circuit arranged at the input side of the reference signal of the replica circuit and correcting the delay difference with the
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: November 6, 2001
    Assignee: Sony Corporation
    Inventors: Takahiro Seki, Katsunori Seno
  • Patent number: 6258096
    Abstract: An extramedullary femoral clamp guide system enables cutting a portion of the distal end of a femur perpendicularly to an ideal weight bearing axis of the femur as viewed in an antero-posterior image of the femur and cutting the frontal surface of a distal end part of the femur in parallel to the frontal surface of the distal end part of the femur.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: July 10, 2001
    Assignee: Mizuho Ika Kogyo Kabushiki Kaisha
    Inventor: Takahiro Seki
  • Patent number: 6254946
    Abstract: An oxygen-absorbing composition comprising (a) a powdery or particulate crosslinked polymer containing carbon-carbon unsaturated bonds and having a high heat resistance and being easy to grind due to crosslinked structure, and (b) a catalyst. The oxygen-absorbing composition can be used in a dry state and can be utilized in an oxygen absorbent package. An oxygen-absorbing multilayered body can be formed from the oxygen-absorbing composition. A sheet or a film oxygen-absorbing multilayered body can be made from the oxygen-absorbing composition.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: July 3, 2001
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Masukazu Hirata, Kazuhiro Otsu, Yoshinori Mabuchi, Noriyuki Kimura, Takahiro Seki
  • Patent number: 5845119
    Abstract: A functional relation between components which can be extracted from an already existing program in advance is automatically extracted by a computer, or such a functional relation which cannot be extracted is defined by a developer, so that the preparation of a program by combining the components is assisted. A dictionary registration unit reads a source code file, analyzes, extracts a component definition, and extracts from the component definition information a counterpart component name, interface name, and interface definition, and registers component name, counterpart component name, interface information of the interface name, and interface definition body in a dictionary. Furthermore, when there is no source codes, the developer inputs the interface information from an input-output device, and registers in the dictionary.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: December 1, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoshi Kozuka, Takashi Ohkoda, Takahiro Seki, Etsuko Yamada, Kazuhiko Sakamoto
  • Patent number: 5545941
    Abstract: A crystal oscillator circuit including a quartz vibrator; an inverter circuit connected in parallel to the quartz vibrator and comprised of at least two transistors connected at their output ends to a first power-supply potential or a second power-supply potential lower than the first power-supply potential; a first current mirror circuit, with one current input-output end connected to a connection line with the inverter circuit of the first power-supply potential, the other current input-output end connected to the output end of the oscillator circuit; and either a second current mirror circuit having two current input-output ends, one current input-output end connected to a connection line with the inverter circuit of the second power-supply potential, the other current input-output end connected to the output end of the oscillator circuit, current flowing to one current input-output end, current flowing to the other current input-output end, and the level of the output end of the oscillator circuit being s
    Type: Grant
    Filed: June 13, 1995
    Date of Patent: August 13, 1996
    Assignee: Sony Corporation
    Inventors: Mitsuo Soneda, Takahiro Seki
  • Patent number: 5296321
    Abstract: A photorecording element consists essentially of a transparent substrate, a layer of a macromolecular compound capable of undergoing a reversible change in structure upon exposure to light, deposited by adsorption on the transparent substrate, and a liquid crystal layer disposed directly on the layer of macromolecular compound. A method for the production of the photorecording element comprises applying on a transparent substrate a mixture of a liquid crystal substance with a macromolecular compound capable of undergoing a reversible change in structure upon exposure to light and allowing the applied layer of the mixture to stand at rest or by first applying the macromolecular compound on the transparent substrate and then adding the liquid crystal substance thereto. A liquid crystal cell incorporating the photorecording element is also disclosed.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: March 22, 1994
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Yuji Kawanishi, Kunihiro Ichimura, Takashi Tamaki, Takahiro Seki, Mitsuhiro Ikeda
  • Patent number: 5230927
    Abstract: A process for metal plating a resin molded article molded from a resin composition containing as main components, a polyphenylene sulfide resin and a glass-reinforcing agent, which comprises, before the metal plating,(1) treating the resin molded article by immersion in a mixed liquid of nitric acid and a fluoride salt or in a mixed liquid of nitric acid and hydrofluoric acid (A treatment), thentreating the resulting resin molded article by immersion in an organic polar solvent-containing liquid (B treatment), and further, if necessary,treating the resulting resin molded article by immersion in an aqueous floride salt or hydrofluoric acid solution (C treatment).
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: July 27, 1993
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Chiharu Nishizawa, Takahiro Seki, Michio Oba, Yukiya Nakazato
  • Patent number: 4963448
    Abstract: A photorecording element is disclosed which consists of a transparent substrate, a molecular layer of an organic compound with an ability to change structure reversibly by virtue of light and disposed in direct contact with the transparent substrate, and a layer of liquid crystals disposed in direct contact with the molecular layer. A liquid crystal cell comprising the photorecording element is also disclosed. A modification having fine deformations on the surface of the transparent substrate and a modification having a dichroic dye contained in the layer of liquid crystals are embraced by the present invention.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: October 16, 1990
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Kunihiro Ichimura, Yasuzo Suzuki, Takahiro Seki, Masako Sakuragi, Takashi Tamaki, Akira Hosoki, Koso Aoki
  • Patent number: 4799806
    Abstract: A miniature linear guide apparatus includes a guide rail having a U-shaped cross section, and a slider movable in the longitudinal direction of the guide rail supported by balls inserted in ball rolling channels formed between each of the inner surfaces of side walls of the guide rail and each of the outer surfaces of the sides of the slider. The slider includes two ball guide members respectively having ball passage arranged parallel to each other and parallel to the ball rolling channels. Each of the ball passages has curved ball passages at opposite ends of the ball passage to connect corresponding ends of the ball rolling channel and the ball passage thereby to constitute a circulating path for the balls through the ball rolling channel passage, the curved passages, and the ball passages.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: January 24, 1989
    Assignee: Nippon Seiko Kabushiki Kaisha
    Inventor: Takahiro Seki