Patents by Inventor John W. Van Norman

John W. Van Norman 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).

  • Sewer inspection device and method of scanning sewers for leaks
    Patent number: 4107738
    Abstract: A camera, as for example a TV camera, is associated with a hydraulic jet nozzle unit whereby delivery of water under pressure to the jet nozzle unit causes rearwardly-directed jets of water to advance the camera and jet unit along a sewer, with the structure being retracted along the sewer by suitable means, such as rewinding a hose which supplies water under pressure to the jet nozzle unit.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: August 15, 1978
    Assignee: Conco Inc.
    Inventor: John W. Van Norman