Patents by Inventor Muneyuki Ishizuka

Muneyuki Ishizuka 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).

  • Oxygen breathing apparatus
    Patent number: 6886562
    Abstract: An oxygen breathing apparatus with a spectacle kit comprising a plurality of frame members of eyeglasses, such as a tubular temple member an tubular endpiece member, and a hinged joint through which the tubular members are rotatably and hermetically connected with each other to establish a common joint portion of these tubular members By providing a thick-walled connection portion in each of the tubular members, the apparatus is free from any deformation of the common joint portion of the tubular members even when folding/unfolding operation of the temple member is repetitively performed.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: May 3, 2005
    Inventor: Muneyuki Ishizuka
  • Oxygen breathing apparatus
    Publication number: 20040050390
    Abstract: An oxygen breathing apparatus with a spectacle kit comprising a plurality of frame members of eyeglasses, such as a tubular temple member an tubular endpiece member, and a hinged joint through which the tubular members are rotatably and hermetically connected with each other to establish a common joint portion of these tubular members By providing a thick-walled connection portion in each of the tubular members, the apparatus is free from any deformation of the common joint portion of the tubular members even when folding/unfolding operation of the temple member is repetitively performed.
    Type: Application
    Filed: June 30, 2003
    Publication date: March 18, 2004
    Inventor: Muneyuki Ishizuka