Patents by Inventor Duc T. Pham

Duc T. Pham 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).

  • Pantograph linkage system
    Patent number: 4437635
    Abstract: A pantograph linkage system for use in a manipulating tool comprises a pair of pantographs linked together in parallel. Each pantograph consists of a pair of arms held in a fixed relative orientation and the two arms comprise components of parallel linkages. A tool holder appropriately mounted on the free end of the arms can then be moved in all three dimensions without changing its spatial orientation. Simple straightline input movements are all that is required to effect movement of the tool holder.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: March 20, 1984
    Assignee: National Research Development Corporation
    Inventor: Duc T. Pham