Patents by Inventor John H. Stufflebeam

John H. Stufflebeam 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).

  • Variable focal length optical system having a constant diameter focal spot
    Patent number: 4705367
    Abstract: An optical system for moving a focal point along an axis employs an input telescope having a variable lens separation and a fixed field lens separated from the telescope by the sum of the focal lengths of the field lens and the second lens of the telescope. The focal spot maintains a constant size as it moves. If two input beams are used, the crossing angle of the beams remains constant.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: November 10, 1987
    Assignee: United Technologies Corporation
    Inventors: Alan C. Eckbreth, John H. Stufflebeam