Patents by Inventor Adolf Elger

Adolf Elger 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).

  • Apparatus for exposure control for microphotography
    Patent number: 4318599
    Abstract: The invention contemplates improved exposure-control means for use in microphotography, providing optional availability of semi-automatic exposure control and of automatic exposure control, the arrangement being optionally and selectively applicable to large-frame and to small-frame (miniature) photography, with provision for appropriate compensation for film speed and, in the case of long-duration exposures, for compensating for the Schwarzschild effect.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: March 9, 1982
    Assignee: Carl Zeiss-Stiftung
    Inventor: Adolf Elger