Patents by Inventor Naoyuki Kokuzawa

Naoyuki Kokuzawa 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).

  • Electronic device
    Patent number: 7630689
    Abstract: An electronic device that can receive an AM radio broadcast signal and has a switching power supply circuit, wherein a switching frequency of the switching power supply circuit is detected and a reception frequency of the AM radio broadcast signal is detected, and when a frequency as an integral multiple of the switching frequency falls within a reception frequency range of the AM radio broadcast signal, a load is added to the switching power supply circuit, whereby the switching frequency is changed.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: December 8, 2009
    Assignee: Sony Corporation
    Inventor: Naoyuki Kokuzawa
  • Electronic device
    Publication number: 20070049202
    Abstract: An electronic device that can receive an AM radio broadcast signal and has a switching power supply circuit, wherein a switching frequency of the switching power supply circuit is detected and a reception frequency of the AM radio broadcast signal is detected, and when a frequency as an integral multiple of the switching frequency falls within a reception frequency range of the AM radio broadcast signal, a load is added to the switching power supply circuit, whereby the switching frequency is changed.
    Type: Application
    Filed: August 22, 2006
    Publication date: March 1, 2007
    Applicant: SONY CORPORATION
    Inventor: Naoyuki Kokuzawa