Patents by Inventor Tokiyoshi Kagawa

Tokiyoshi Kagawa 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).

  • Apparatus for manufacturing a slat for a shutter
    Patent number: 4343171
    Abstract: A cold roll forming apparatus for forming a slat for a shutter having forming rolls successively disposed along a path line of the material and a pattern embossing roll disposed along the path line is shown. Metal band sheet fed through the apparatus is formed into a predetermined slat configuration and simultaneously repeated patterns are embossed on the flat surface of the slat.
    Type: Grant
    Filed: May 29, 1980
    Date of Patent: August 10, 1982
    Assignee: Sanwa Shutter Corporation
    Inventor: Tokiyoshi Kagawa