Patents by Inventor Werner Wiessner

Werner Wiessner 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).

  • Photographic objective with automatic diaphragm
    Patent number: 4504134
    Abstract: A compensating mechanism is provided on the leaf guide ring of a photographic objective for single-lens mirror reflex camera which opens to its largest value after a picture is taken in response to the hinge motion of the camera reflex mirror. The mechanism compensates for the advance of the diaphragm control lever on the camera side controlled by the reflex mirror.
    Type: Grant
    Filed: October 4, 1983
    Date of Patent: March 12, 1985
    Assignee: Ernst Leitz Wetzlar GmbH
    Inventors: Werner Schlapp, Werner Wiessner