Patents by Inventor Lisa Marie Christopherson

Lisa Marie Christopherson 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).

  • Method for controlling a variable-speed engine
    Patent number: 7165530
    Abstract: A method for controlling a variable-speed engine of a machine is provided. The machine may include a park-brake. The method may include receiving a signal indicating an engagement status of the park-brake. The method may also include operating the variable-speed engine at a first idle speed. Additionally, the method may include operating the variable-speed engine at a second idle speed, lower than the first idle speed, only if the signal indicates that the park-brake is engaged.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: January 23, 2007
    Assignee: Caterpillar Inc
    Inventors: Jeffrey Edward Jensen, Marvin Kent Palmer, Lisa Marie Christopherson, Joel Robert Frerichs