Patents by Inventor Peter R. Rahm

Peter R. Rahm 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).

  • Apparatus and method for adjusting the color temperature of white semiconduct or light emitters
    Patent number: 6636003
    Abstract: An LED arrangement which produces a color temperature adjustable white light. The LED arrangement includes one or more white LEDs and a first drive circuit operable to supply a first drive current to the one or more white LEDs such that a white light is output at a desired intensity. The LED arrangement further includes one or more colored LEDs arranged such that a light output from the one or more colored LEDs combines with the white light to produce a resultant light having a desired color temperature. The colored LEDs are driven by a second drive circuit which supplies a second drive current to the one or more colored LEDs such that a colored light is output at a desired intensity, the intensity of the colored light output from the one or more colored LEDs being adjustable so as to adjust the color temperature of the resultant light.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: October 21, 2003
    Assignee: Spectrum Kinetics
    Inventors: Peter R. Rahm, William R. McGrath
  • Apparatus and method for adjusting the color temperature of white semiconductor light emitters
    Publication number: 20020048177
    Abstract: An LED arrangement which produces a color temperature adjustable white light. The LED arrangement includes one or more white LEDs and a first drive circuit operable to supply a first drive current to the one or more white LEDs such that a white light is output at a desired intensity. The LED arrangement further includes one or more colored LEDs arranged such that a light output from the one or more colored LEDs combines with the white light to produce a resultant light having a desired color temperature. The colored LEDs are driven by a second drive circuit which supplies a second drive current to the one or more colored LEDs such that a colored light is output at a desired intensity, the intensity of the colored light output from the one or more colored LEDs being adjustable so as to adjust the color temperature of the resultant light.
    Type: Application
    Filed: September 6, 2001
    Publication date: April 25, 2002
    Inventors: Peter R. Rahm, William R. McGrath
  • Method and apparatus for indicating the position of one well bore with respect to a second well bore
    Patent number: 4016942
    Abstract: A compression wave type signal of a selected frequency is transmitted into the ground at the bottom of a well bore being drilled. The signal is picked up by four microphones that are positioned in another well bore. The microphones have a known orientation with respect to the desired course of the well bore being drilled. The phase relationship of the transmitted signal picked up by the microphones is used to indicate at the surface the deviation between the course of the well being drilled and the desired course.
    Type: Grant
    Filed: December 28, 1973
    Date of Patent: April 12, 1977
    Assignee: Trunkline Gas Company
    Inventors: David E. Wallis, Jr., Robert G. Polansky, Peter R. Rahm
  • Light tube assembly
    Patent number: D612528
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: March 23, 2010
    Assignee: LEDdynamics, Inc.
    Inventors: William Richard McGrath, Oliver Alexander Piluski, Jason Michael Orzell, Peter R. Rahm
  • Light tube assembly
    Patent number: D634876
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: March 22, 2011
    Assignee: LEDdynamics, Inc.
    Inventors: William Richard McGrath, Oliver Alexander Piluski, Jason Michael Orzell, Peter R. Rahm