Patents by Inventor Douglas B. Mayfield

Douglas B. Mayfield 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).

  • Agricultural rate management
    Patent number: 9338938
    Abstract: Agricultural rate adjustments performed by autopilots or farm information displays help eliminate guesswork and improve farm efficiency.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: May 17, 2016
    Assignee: Trimble Navigation Limited
    Inventors: Michael F Cash, Douglas B Mayfield, Gregory D Chiocco, Geoffrey W Mirfin
  • Agricultural Rate Management
    Publication number: 20130311050
    Abstract: Agricultural rate adjustments performed by autopilots or farm information displays help eliminate guesswork and improve farm efficiency.
    Type: Application
    Filed: May 15, 2012
    Publication date: November 21, 2013
    Applicant: TRIMBLE NAVIGATION LIMITED
    Inventors: Michael F. Cash, Douglas B. Mayfield, Gregory D. Chiocco, Geoffrey W. Mirfin
  • Controllable external to internal antenna switching algorithm and circuit for position reporting device
    Patent number: 7742874
    Abstract: A method for configuring an electronic device comprising: (A) substantially continuously detecting motion of the electronic device using an initiating device disposed within the electronic device, the electronic device further comprising a position determining component, and a wireless communications component; (B) substantially continuously receiving at least one external radio signal by using an initially selected antenna of the position determining component; (C) if reception of at least one external radio signal is not optimized, using the antenna/power supply switch to switch radio signal path between the initially selected antenna and a subsequently selected antenna to optimize the reception of at least one external radio signal; and (D) using the wireless communications component to transmit the current status of the external/internal antenna to the position tracking station.
    Type: Grant
    Filed: May 6, 2006
    Date of Patent: June 22, 2010
    Assignee: Trimble Navigation Ltd.
    Inventors: Douglas B. Mayfield, Brian Abraham Jackson, Dennis Lee Workman