Patents by Inventor Hironao Chikusa

Hironao Chikusa 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).

  • Nonreciprocal circuit device, communication device, and method of manufacturing nonreciprocal circuit device
    Patent number: 6968609
    Abstract: A nonreciprocal circuit device, in which metal members which form a metal case can be resistance-welded stably and reliably, having high reliability and satisfactory characteristics, a communication device using the nonreciprocal circuit device, and a method of manufacturing the nonreciprocal circuit device. Protruding portions are formed at two places on each side wall of an upper metal case. The upper metal case and a lower metal case are bonded together by resistance welding the two side walls of the lower metal case to the two side walls of the upper metal case at the protruding portions.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: November 29, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kenichi Matsuoka, Hironao Chikusa, Takashi Kadooka
  • Nonreciprocal circuit device, communication device, and method of manufacturing nonreciprocal circuit device
    Publication number: 20040263275
    Abstract: A nonreciprocal circuit device, in which metal members which form a metal case can be resistance-welded stably and reliably, having high reliability and satisfactory characteristics, a communication device using the nonreciprocal circuit device, and a method of manufacturing the nonreciprocal circuit device. Protruding portions are formed at two places on each side wall of an upper metal case. The upper metal case and a lower metal case are bonded together by resistance welding the two side walls of the lower metal case to the two side walls of the upper metal case at the protruding portions.
    Type: Application
    Filed: July 23, 2004
    Publication date: December 30, 2004
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kenichi Matsuoka, Hironao Chikusa, Takashi Kadooka
  • Nonreciprocal circuit device, communication device, and method of manufacturing nonreciprocal circuit device
    Publication number: 20020121942
    Abstract: A nonreciprocal circuit device, in which metal members which form a metal case can be resistance-welded stably and reliably, having high reliability and satisfactory characteristics, a communication device using the nonreciprocal circuit device, and a method of manufacturing the nonreciprocal circuit device. Protruding portions are formed at two places on each side wall of an upper metal case. The upper metal case and a lower metal case are bonded together by resistance welding the two side walls of the lower metal case to the two side walls of the upper metal case at the protruding portions.
    Type: Application
    Filed: February 26, 2002
    Publication date: September 5, 2002
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Kenichi Matsuoka, Hironao Chikusa, Takashi Kadooka