Patents by Inventor Tomohiro Sawazaki

Tomohiro Sawazaki 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).

  • One-wavelength loop antenna
    Patent number: 8314741
    Abstract: A one-wavelength loop antenna includes a looped antenna element having a length equivalent to one wavelength related to communication; and a feeding cable for feeding current to a feeding point on the antenna element, wherein an inner conductor is disposed inside an outer conductor in a section between the feeding point and an extraction position of the feeding cable distanced from the feeding point by ? wavelength or more, at least one of the outer and inner conductors functioning as the feeding cable.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: November 20, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Takuya Nagai, Tomohiro Sawazaki
  • ONE-WAVELENGTH LOOP ANTENNA
    Publication number: 20100245193
    Abstract: A one-wavelength loop antenna includes a looped antenna element having a length equivalent to one wavelength related to communication; and a feeding cable for feeding current to a feeding point on the antenna element, wherein an inner conductor is disposed inside an outer conductor in a section between the feeding point and an extraction position of the feeding cable distanced from the feeding point by ? wavelength or more, at least one of the outer and inner conductors functioning as the feeding cable.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 30, 2010
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Takuya Nagai, Tomohiro Sawazaki
  • LOOP ANTENNA UNIT
    Publication number: 20100245194
    Abstract: A loop antenna unit includes a looped antenna element; a first feeding cable that feeds power to a first feeding point on the antenna element; a second feeding cable that feeds power to a second feeding point on the antenna element; and a circuit switching portion that disconnects a feeding cable corresponding to an unused feeding point out of the first feeding point and the second feeding point, from the unused feeding point, wherein the feeding cable transmits a signal generated by superposing a high-frequency signal related to communication by the loop antenna unit on a dc signal for control over switching by the circuit switching portion, and wherein the loop antenna unit further includes: a first filter that extracts a high-frequency signal related to communication by the loop antenna unit from a signal supplied through the feeding cable and supplies the extracted high-frequency signal to the antenna element; and a second filter that extracts a dc signal for control over switching by the circuit switchin
    Type: Application
    Filed: March 11, 2010
    Publication date: September 30, 2010
    Applicant: Brother Kogyo Kabushiki Kaisha
    Inventors: Tomohiro Sawazaki, Takuya Nagai