Patents by Inventor Walter Mitchko

Walter Mitchko 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).

  • Mold for building block units
    Patent number: D267407
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: December 28, 1982
    Inventor: Walter Mitchko