Patents by Inventor Satohiro Furukawa

Satohiro Furukawa 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).

  • Building drainage system
    Patent number: 6425217
    Abstract: A building drainage system including: a drainage stack passing through stories in the vertical direction; appliance drainage pipes connected to water-service terminal appliances on each of the stories; and a combined joint for connecting the appliance drainage pipes provided on each of the stories to the drainage stack. In this system, the combined joint for connecting the appliance drainage pipes provided on each of the stories to the drainage stack is at a level lower than that of a floor slab of the story, to sufficiently give a vertical velocity component to a fluid flowing in each of the appliance drainage pipes, thereby combining the fluid to a fluid flowing in the drainage stack.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 30, 2002
    Assignee: Bridgestone Corporation
    Inventors: Satohiro Furukawa, Nobuyuki Tsukagoshi