Patents by Inventor Ranjit Roy

Ranjit Roy 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).

  • Radiation shielding door
    Patent number: 4646659
    Abstract: A radiation shielding door of massive concrete mounted to move parallel to a wall surface adjacent a door opening, while supported on a plurality of roller assemblies which travel along a rail mounted in the floor.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: March 3, 1987
    Assignee: The Austin Company
    Inventor: Ranjit Roy