Patents by Inventor Walter Swarofsky

Walter Swarofsky 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).

  • Camera having depth of focus indicating means
    Patent number: 4341451
    Abstract: A device for indicating the depth of field of a camera having aperture setting means and range setting means. The device comprises a plurality of optically active elements positioned for view in the camera viewfinder and scale means associated with the optically active elements. Means are also provided which are responsive to the camera aperture setting and the range setting to select adjacent ones of the optically active elements to indicate the depth of field.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: July 27, 1982
    Assignee: Rollei-Werke Franke & Heidecke GmbH & Co. KG
    Inventors: Roland Krueger, Joachim Proske, Ortwin Rosner, Walter Swarofsky