Patents by Inventor Bernard J. Berg

Bernard J. Berg 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).

  • Control system for the electrolytic recovery of silver from photographic fixing solution
    Patent number: 4263108
    Abstract: Plating current in a silver-recovery process is controlled as a function of the cell voltage of the system taken in the absence of plating current, and held as a control determinant. The control is modified to produce certain characteristics at low silver concentration to further reduce sulfiding.
    Type: Grant
    Filed: March 27, 1980
    Date of Patent: April 21, 1981
    Assignee: Foresight Enterprises, Incorporated
    Inventors: Bernard J. Berg, Darrell T. Thompson
  • Compensated densitometer
    Patent number: 4080075
    Abstract: The output of a test light of a densitometer is divided into a test beam and a reference beam. The test beam is caused to traverse film samples, and impinge on a detector that produces a signal responsive to the intensity of the received light. A second detector is arranged to receive the reference beam, which does not traverse the film sample. A measuring system is responsive to the output of the first detector, and utilizes the output of the second detector to compensate for variations in the intensity of the test light.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: March 21, 1978
    Assignee: Foresight Enterprises, Inc.
    Inventor: Bernard J. Berg