Patents by Inventor Masahiko Yosida

Masahiko Yosida 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).

  • LED unit and illumination apparatus using same
    Patent number: 8684568
    Abstract: An LED unit includes a plate-shaped base; a light-emitting device placed on a surface of the base and having one or more LED chips; and a cover mounted to the base at a location above a front side of the light-emitting device and having a function to transmit light emitted from the light-emitting device. The base has on the surface thereof an annular groove for receiving a seal therein, and the cover has on a surface thereof directed to the base an annular protruding part, the annular protruding part being inserted into the annular groove to seal the base and the cover through the seal. A distance between the protruding part and the groove in a width direction of the groove is shorter in a section of the groove than the other sections of the groove.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: April 1, 2014
    Assignee: Panasonic Corporation
    Inventors: Shinichi Nagaoka, Yutaka Kitaguchi, Masahiko Yosida
  • LED UNIT AND ILLUMINATION APPARATUS USING SAME
    Publication number: 20120218760
    Abstract: An LED unit includes a plate-shaped base; a light-emitting device placed on a surface of the base and having one or more LED chips; and a cover mounted to the base at a location above a front side of the light-emitting device and having a function to transmit light emitted from the light-emitting device. The base has on the surface thereof an annular groove for receiving a seal therein, and the cover has on a surface thereof directed to the base an annular protruding part, the annular protruding part being inserted into the annular groove to seal the base and the cover through the seal. A distance between the protruding part and the groove in a width direction of the groove is shorter in a section of the groove than the other sections of the groove.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 30, 2012
    Applicant: Panasonic Corporation
    Inventors: Shinichi NAGAOKA, Yutaka Kitaguchi, Masahiko Yosida