Patents by Inventor John C. Canu

John C. Canu 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).

  • Electric watt-hour meter testing device
    Patent number: 4271390
    Abstract: A self-contained meter tester that provides the ability to test the efficiency of an electric watt-hour meter at the operational site by isolating the meter from the normally connected time-varying load, passing a known voltage through the meter to a calibrated constant load and measuring the known load with the meter to check its operational accuracy. In another aspect of the invention, the meter tester includes the ability to independently measure the constant load and for adjusting the same to a selected value.
    Type: Grant
    Filed: January 29, 1980
    Date of Patent: June 2, 1981
    Inventor: John C. Canu