Patents by Inventor Erich R. Knodel

Erich R. Knodel 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).

  • Piston for a metering device and a method of producing same
    Patent number: 4315454
    Abstract: A piston for a metering device with a glass cylinder which comprises a cylindrical core of glass, ceramic or metal and a casing of poly(tetrafluoroethylene) reinforced with 10 to 60 weight percent glass fibers.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: February 16, 1982
    Assignee: Walter Graf u. Co. GmbH & Co.
    Inventor: Erich R. Knodel