Patents by Inventor Donald T. Kaplan

Donald T. Kaplan 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).

  • Window jam friction shoe
    Patent number: D317713
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: June 25, 1991
    Inventor: Donald T. Kaplan
  • Housing for a window opening operator
    Patent number: D333971
    Type: Grant
    Filed: February 13, 1991
    Date of Patent: March 16, 1993
    Assignee: Lake Country Sales, Inc.
    Inventors: Donald T. Kaplan, Anthony W. Merchlewitz, Louis G. Lieske