Patents by Inventor Stephen Michael Randall

Stephen Michael Randall 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).

  • Illumination device utilizing displaced radiation patterns
    Patent number: 6957904
    Abstract: In one embodiment, the invention is directed to an illumination device. The illumination device includes a light emitting diode that emits a radiation pattern, wherein a maximum luminous intensity of the radiation pattern is displaced relative to a center axis of the light emitting diode. The illumination device may also include a number of light guides positioned to be illuminated by the light emitting diode. The invention utilizes the “batwing” radiation pattern of a light emitting diode to effectively illuminate a number of light guides with a single light emitting diode. Each light guide is offset from a center axis of the light emitting diode to capture light that is annularly displaced. This offset positioning of the light guides allows the light guides to effectively capture light from the light emitting diode where light intensity is greatest.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: October 25, 2005
    Assignee: 3M Innovative Properties Company
    Inventor: Stephen Michael Randall
  • Illumination device utilizing displaced radiation patterns
    Publication number: 20030021122
    Abstract: In one embodiment, the invention is directed to an illumination device. The illumination device includes a light emitting diode that emits a radiation pattern, wherein a maximum luminous intensity of the radiation pattern is displaced relative to a center axis of the light emitting diode. The illumination device may also include a number of light guides positioned to be illuminated by the light emitting diode. The invention utilizes the “batwing” radiation pattern of a light emitting diode to effectively illuminate a number of light guides with a single light emitting diode. Each light guide is offset from a center axis of the light emitting diode to capture light that is annularly displaced. This offset positioning of the light guides allows the light guides to effectively capture light from the light emitting diode where light intensity is greatest.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 30, 2003
    Inventor: Stephen Michael Randall