Patents by Inventor Alexander MacMullen

Alexander MacMullen 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).

  • System for measurement of selected performance characteristics of microwave components
    Patent number: 6484124
    Abstract: An improved process and apparatus for measuring performance characteristics of microwave power components. The invention involves the use of a rotating phase reference technique to improve measurement. The process and apparatus result in fast, accurate, reproducible determination of the desired properties. In addition, the apparatus of the present invention is lightweight, compact, and portable.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: November 19, 2002
    Assignee: Technology Service Corporation
    Inventor: Alexander MacMullen
  • FM canceler loop to reduce shock and vibration effects in crystal oscillators
    Patent number: 5963098
    Abstract: A canceler loop is used to provide negative feedback to a crystal oscillator to reduce the effects of shock and vibration on the spectral purity of the crystal oscillator. The canceler loop demodulates the output of the crystal oscillator and supplied a stabilizing voltage representative of the demodulated output to cancel frequency modulation induced by shock and vibration. The stabilizing voltage is used to cancel the noise sidebands of the frequency spectrum of the crystal oscillator output without tuning the center frequency.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: October 5, 1999
    Assignee: Technology Service Corporation
    Inventors: Alexander MacMullen, Vaughn L. Wright