Patents by Inventor Eric C. Heinrich

Eric C. Heinrich 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).

  • Nonlinearly variable gain apparatus
    Patent number: 4151478
    Abstract: A nonlinearly variable gain circuit is utilized to produce an inverted logarithmic S curve of gain versus potentiometer rotation while using a linear resistance taper potentiometer. An operational amplifier feedback circuit uses the linear potentiometer and a resistance network in combination.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: April 24, 1979
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Eric C. Heinrich, William H. Mosley, Jr.