Patents by Inventor Virginia S. Griser, legal representative

Virginia S. Griser, legal representative 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).

  • X-ray tube preheat control
    Patent number: 7016468
    Abstract: A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and diagnostic radiation emission begins. This circuit eliminates a fixed amount of preheat pulses which contribute unusable radiation during preheat of the filament in prior art systems.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: March 21, 2006
    Assignee: Progeny, Inc.
    Inventors: Alan P. Krema, Virginia S. Griser, legal representative, John T. Griser, deceased