Patents by Inventor Dandamudi V. Rao

Dandamudi V. Rao 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).

  • Method and means for variably attenuating radiation
    Patent number: 6201852
    Abstract: A variable attenuation apparatus for use with a radiation-blocking liquid and a radiation source having an attenuation chamber capable of containing a layer of the radiation-blocking liquid and an adjustment device for selectively metering the thickness of the layer of the radiation-blocking liquid, whereby changes in the thickness of the layer alter the radiation transmitted through the attenuation chamber. In one embodiment, an adjustment device includes a reservoir for holding the radiation-blocking liquid and a siphon connection device for allowing the transfer of the radiation-blocking liquid between the reservoir and the attenuation chamber, wherein the thickness of the layer in the attenuation chamber varies in response to changes in elevation of said reservoir, so that an increase in the thickness of the layer causes a drop in the radiation transmitted through the attenuation chamber.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: March 13, 2001
    Assignee: University of Medicine & Denistry of New Jersey
    Inventors: Sreekrishna Murty Goddu, Roger W. Howell, Dandamudi V. Rao