Patents by Inventor Shozaburo Shimizu

Shozaburo Shimizu 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).

  • Process for scrub brush manufacture
    Patent number: 4206948
    Abstract: A scrubbing-brush is manufactured by the following process. First, a number of nets formed of fibers connected with one another are secured. The bundle is bundled at an intermediate portion thereof by a bundling member. Then, the bundle is cut at opposite sides of the bundling member. The thus cut bundle is then heated to cause memory deformation of the fibers, thus completing a scrubbing-brush. The thus finished scrubbing-brush has a number of fibers having respective ends formed with smooth convex bristle surfaces.
    Type: Grant
    Filed: January 23, 1979
    Date of Patent: June 10, 1980
    Inventor: Shozaburo Shimizu