Patents by Inventor Charles G. Hull

Charles G. Hull 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).

  • Fiber optic scatterometer for measuring optical surface roughness
    Patent number: 4991971
    Abstract: A method and apparatus for measuring scattered light reflectance. The apparatus comprises a plurality of individual light transmitting fibers having first receiving ends positioned at different angular locations about an object to be tested and second exiting ends positioned in a linear array. The apparatus can simultaneously receive different angular components of scattered light from the object being tested and convert the scattered light components into a linear array.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: February 12, 1991
    Assignee: United Technologies Corporation
    Inventors: Joseph M. Geary, Charles G. Hull-Allen
  • CMOS Frequency divider circuit having invalid signal override
    Patent number: 4369379
    Abstract: An improved CMOS frequency divider circuit is disclosed which has override logic for forcing the circuit to exit from a forbidden state to a valid state.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: January 18, 1983
    Assignee: Texas Instruments Incorporated
    Inventor: Charles G. Hull
  • CMOS Switching circuit
    Patent number: 4342927
    Abstract: A CMOS switching circuit is disclosed which switches between first and second input signals, which are preferably phase and frequency related, in response to changes in the logical condition of a control signal.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: August 3, 1982
    Assignee: Texas Instruments Incorporated
    Inventor: Charles G. Hull