Patents by Inventor John Urmson

John Urmson 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).

  • Monolithic construction of waveguide tubes
    Patent number: 5408439
    Abstract: A method and apparatus for acoustic energy cancellation in waveguide tube assemblies which enables monolithic construction thereof.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: April 18, 1995
    Inventor: John Urmson
  • Method and apparatus for fluid mixture monitoring, constituent analysis, and composition control
    Patent number: 5060507
    Abstract: A method and apparatus for fluid mixture monitoring and controlling using an acoustic sensing technique by pulsing a fluid sample and a reference fluid in elongated chambers with sound waves generated at one end of the chambers and sensing the resonant frequencies in the chambers, or the time lapse for the sound waves to traverse the chambers, with transducers disposed proximate the other ends of the chambers and ratiometrically comparing the time-based measurements.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: October 29, 1991
    Inventors: John Urmson, Anthony Pearson, Sanjay Gidwani