Patents by Inventor Masaru Tagawa

Masaru Tagawa 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).

  • Light emitting block
    Patent number: 6655814
    Abstract: A light emitting block of this invention includes, mounted in a main block body (1), solar batteries for (2) for generating light emitting electric power, an electric double layer capacitor (3) for storing the electric power, a planar light emitting member (4), and a light emission control circuit for controlling lighting of the planar light emitting portion (4). In the daytime, the solar batteries (2) receive ambient sunlight through a block surface portion (1A). The electric power of solar batteries (2) accumulates in the double layer capacitor (3). At nighttime, a light emitting surface (4A) of planar light emitting portion (4) automatically emits light with the electric power stored in the electric double layer capacitor (3), to make the block shine.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: December 2, 2003
    Inventors: Masaru Tagawa, Harumi Takeda
  • Light emitting tile
    Patent number: D446586
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: August 14, 2001
    Inventor: Masaru Tagawa
  • Light emitting tile
    Patent number: D459005
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: June 18, 2002
    Inventor: Masaru Tagawa