Patents Represented by Attorney Larry A. Root
  • Patent number: 5193383
    Abstract: A method and apparatus to use an Atomic Force Microscope to take measurements of surface forces, indentation, adhesion and mechanical properties such as hardness and elasticity. The force between a probe mounted cantilever and a sample is measured as a function cantilever deflection measured by a electron tunneling microscope. The sample and the tip of the tunneling microscope are each mounted on piezoelectric manipulators which provide for position control. Position of the sample and probe are measured from the voltages applied to the piezoelectric manipulators. Penetration is determined by the relative motion between the probe and sample. Presently, this invention has a force resolution of 1 nN and a depth resolution of 0.02 nm.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: March 16, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Nancy A. Burnham, Richard J. Colton
  • Patent number: 4943556
    Abstract: A combination of optical interconnect technology with superconducting matal to form a superconducting neural network array. Superconducting material in a matrix has the superconducting current decreased in one filament of the matrix by interaction of the Cooper pairs with radiation controlled by a spatial light modulator. This decrease in current results in a switch of current, in a relative sense, to another filament in the matrix. This "switching" mechanism can be used in a digital or analog fashion in a superconducting computer application.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: July 24, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Harold H. Szu
  • Patent number: 4904882
    Abstract: A combination of optical interconnect technology with superconducting matal to form a superconducting neural network array. Superconducting material in a matrix has the superconducting current decreased in one filament of the matrix by interaction of the Cooper pairs with radiation controlled by a spatial light modulator. This decrease in current results in a switch of current, in a relative sense, to another filament in the matrix. This "switching" mechanism can be used in a digital or analog fashion in a superconducting computer application.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: February 27, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Harold H. Szu