Patents by Inventor Henrick Allison

Henrick Allison 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).

  • Frequency response analyzer
    Patent number: 4322806
    Abstract: A frequency response analyzer having means for producing a phase modulated test signal for input into the system under test; means for dividing the output signal from the system under test into two channels. Means for multiplying the test signal of each channel by a reference signal; the reference signal of one channel corresponding to the test signal and the other reference signal corresponding to the test signal but being out of phase thereto by 90.degree.; means for integrating the product of each channel, and means for analyzing the resultant signal from each channel.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: March 30, 1982
    Inventor: Henrick Allison