Patents by Inventor Peter John Lagergren

Peter John Lagergren 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).

  • Ultrasonic fuel level monitoring device
    Patent number: 7287425
    Abstract: The invention describes a method of altering the transmitted frequency used in an ultrasonic ranging system for liquid level measurement in a fuel tank. The frequency agility of the system is an important component of performing liquid level measurement in an enclosed vessel.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: October 30, 2007
    Assignee: Xtero Datacom Inc.
    Inventor: Peter John Lagergren
  • Method of exciting a piezoelectric crystal
    Patent number: 7245059
    Abstract: The invention describes the use of an electrical pulse that is a single square wave to excite a piezoelectric crystal. This pulse is applied alternately to either side of the crystal at twice the nominal resonant frequency of the crystal. This method provides a significant increase in net drive power to the crystal without the need to provide a sine wave excitation of plus and minus voltage to the crystal.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: July 17, 2007
    Assignee: Xtero Datacom Inc.
    Inventors: Peter John Lagergren, Steven Scott Kazemir