Patents by Inventor Takaharu Takahashi

Takaharu Takahashi 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).

  • Method of forming a decorative layer on a precast concrete board
    Patent number: 4134956
    Abstract: A decorative coating layer, unified with the succulent and fragile surface of a concrete board, is formed by a method comprising laminating an inorganic and hydraulic coating material on the surface of an unhardened concrete board placed in a mold, and immediately thereafter heat-curing the thus coated concrete board. According to this method, beautifully dressed precast concrete boards can be mass-produced by a shortened process with improved efficiency of operation.
    Type: Grant
    Filed: January 8, 1975
    Date of Patent: January 16, 1979
    Assignee: Kowa Chemical Industry Ltd.
    Inventors: Yoshinori Suzuki, Akihiko Asayama, Fumio Dohi, Takaharu Takahashi, Isao Toyomoto