Patents by Inventor Cornelis B. de Ruiter

Cornelis B. de Ruiter 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).

  • Ceiling panel element
    Patent number: D260039
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: July 28, 1981
    Assignee: Hunter Douglas N.V.
    Inventor: Cornelis B. de Ruiter