Patents by Inventor Ryouji Matsuoka

Ryouji Matsuoka 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).

  • Ventilating apparatus
    Patent number: 5085132
    Abstract: A ventilating apparatus includes a duct including an indoor air inlet port for taking in indoor air and an indoor air outlet port for discharging the indoor air to the outdoors, a one-way valve for opening the indoor air outlet port when discharging the indoor air to the outdoors, the one-way valve being disposed on the indoor air outlet port, and a filter for purifying contaminated outdoor air intruding from the outdoors by way of the indoor air outlet port. The indoor air can be discharged to the outdoors as smoothly as it is done with a conventional ventilating apparatus, and at the same time the contaminated outdoor air is filtered and thereafter introduced into a room as clean outdoor air. Hence, it is possible to prevent the inside of a room from being contaminated with contaminated outdoor air.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: February 4, 1992
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Kazutoshi Ikeda, Hiroshi Kuriyama, Tetsumi Ichioka, Ryouji Matsuoka