Patents by Inventor Futoshi Fujiwara

Futoshi Fujiwara 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).

  • Valve structure for internal combustion
    Patent number: 7556011
    Abstract: A sealing region where a valve seat and an outer peripheral surface of a enlarged diameter portion of a flare portion are contacted to each other is configured so that an end on a side opposite a combustion chamber is positioned at a position same as or on a side away from the combustion chamber than an end on a side close to the combustion chamber of a connecting region where a lid member and an inner peripheral surface of the enlarged diameter portion are connected with respect to the axis line direction.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: July 7, 2009
    Assignees: Suncall Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryuji Kishihara, Keiichiro Teratoko, Tadashi Saito, Takao Suzuki, Futoshi Fujiwara
  • Valve Structure for Internal Combustion
    Publication number: 20070277769
    Abstract: A sealing region where a valve seat and an outer peripheral surface of a enlarged diameter portion of a flare portion are contacted to each other is configured so that an end on a side opposite a combustion chamber is positioned at a position same as or on a side away from the combustion chamber than an end on a side close to the combustion chamber of a connecting region where a lid member and an inner peripheral surface of the enlarged diameter portion are connected with respect to the axis line direction.
    Type: Application
    Filed: June 4, 2007
    Publication date: December 6, 2007
    Inventors: Ryuji Kishihara, Keiichiro Teratoko, Tadashi Saito, Takao Suzuki, Futoshi Fujiwara
  • Combination triangular waveform generator and triangular to pseudo-sinusoidal waveform converter circuit
    Patent number: 6859076
    Abstract: The present invention comprises an integral triangular voltage waveform generator (170, 180) and triangular to pseudo-sinusoidal current waveform converter (170, 180). The outputs of the present invention are preferably differential (130, 131), although the invention can easily be modified for single ended output. The frequency of the output waveforms corresponds to the frequency of the input reference clock.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: February 22, 2005
    Inventor: Futoshi Fujiwara
  • High PSRR current source
    Patent number: 6778005
    Abstract: The present invention improves on the topology of a conventional current source by interposing an RC circuit and additional MOS between the output of a buffer and the output of the current source. The topology of the present invention advantageously provides a clean current output by shunting noise to ground.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: August 17, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Futoshi Fujiwara, Akihiko Miyanohara
  • Combination triangular waveform generator and triangular to pseudo-sinusoidal waveform converter circuit
    Publication number: 20040085102
    Abstract: The present invention comprises an integral triangular voltage waveform generator (170, 180) and triangular to pseudo-sinusoidal current waveform converter (170, 180). The outputs of the present invention are preferably differential (130, 131), although the invention can easily be modified for single ended output. The frequency of the output waveforms corresponds to the frequency of the input reference clock.
    Type: Application
    Filed: September 8, 2003
    Publication date: May 6, 2004
    Inventor: Futoshi Fujiwara
  • High PSRR current source
    Publication number: 20030169099
    Abstract: The present invention improves on the topology of a conventional current source by interposing an RC circuit and additional MOS between the output of a buffer and the output of the current source. The topology of the present invention advantageously provides a clean current output by shunting noise to ground.
    Type: Application
    Filed: December 27, 2002
    Publication date: September 11, 2003
    Inventors: Futoshi Fujiwara, Akihiko Miyanohara