Patents by Inventor Walter G. Koosman

Walter G. Koosman 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).

  • Wire puzzle
    Patent number: D292809
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: November 17, 1987
    Inventor: Walter G. Koosman