Patents by Inventor Hiroshi Numata

Hiroshi Numata 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).

  • Nematic liquid-crystal composition for active matrix application
    Patent number: 5308543
    Abstract: The invention relates to a nematic liquid-crystal composition for active matrix displays with high voltage holding ratio and extremely good low temperature stability.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: May 3, 1994
    Assignees: Merck Patent Gesellschaft mit besrankter Haftung, Sharp Corporation
    Inventors: Kei Sasaki, Masako Okada, Shuichi Kohzaki, Fumiaki Funada, Bernhard Rieger, Hiroshi Numata, Reinhard Hittich, Herbert Plach, Thomas Geelhaar, Eike Poetsch, Volker Reiffenrath
  • Control system for peripheral devices
    Patent number: 5294929
    Abstract: In a control system for peripheral devices, by operating only one device for digital-to-analogue conversion, the specific output switching corresponding to that specific device for digital-to-analogue conversion is closed and the other output switching corresponding to the other device for digital-to-analogue conversion are open so that the only the output signal of that specific device for digital-to-analogue conversion can be output. Thus, the accuracy of operation of each device for digital-to-analogue conversion can be easily evaluated.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: March 15, 1994
    Assignee: Sony Corporation
    Inventors: Hiroshi Numata, Seiichi Nishiyama
  • Nematic liquid-crystal composition for active matrix application
    Patent number: 5279763
    Abstract: A nematic liquid-crystal composition for active matrix displays has a high voltage holding ratio and extremely good low temperature stability.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: January 18, 1994
    Assignees: Merck Patent Gesellschaft mit beschrankter Haftung, Sharp Corporation
    Inventors: Kei Sasaki, Masako Okada, Shuichi Kohzaki, Fumiaki Funada, Hiroshi Numata, Shohei Naemura, Bernhard Rieger, Herbert Plach
  • Digital phase comparator for use in a phase lock loop
    Patent number: 5124594
    Abstract: A Digital Phase Comparator has a simplified logic circuit in which Nand Circuits provide UP and DOWN signals containing phase information about E and F signals.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: June 23, 1992
    Assignee: Sony Corporation
    Inventors: Hiroshi Numata, Tamotsu Kogo, Shinichi Kitazono, Fumio Ishikawa, Akira Sato
  • Moving object detection system
    Patent number: 4187487
    Abstract: This invention relates to a detection system for detecting presence of moving objects such as vehicles, etc. through utilization of ultrasonic energy which includes a predetermined location provided in memory unit and having stored therein time from transmission of ultrasonic energy till reception of reflected energy corresponding thereto from a road surface, circuitry for computing difference a between immediately preceding time from transmission of ultrasonic energy till reception of reflected energy corresponding thereto stored in the predetermined memory location and current time from transmission of ultrasonic energy and reception of reflected energy corresponding thereto, circuitry for storing in the predetermined memory location the current time from transmission of ultrasonic energy till reception of reflected energy corresponding thereto when the difference a is less than a predetermined time .alpha.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: February 5, 1980
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Hiroshi Numata, Akihiko Otani, Masao Mizuno