Patents Represented by Attorney Gerald R Prettyman

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  • Low numerical aperture (low-NA) solar lighting system
    Patent number: 8339709
    Abstract: A low numerical aperture (low-NA) light concentration and transmission system collects, concentrates and transmits light for interior illumination. A solar tracker aligns a primary light concentrator to collect light and direct the light to a secondary light concentrator and a filter for removing ultraviolet and infrared radiation. On exiting the secondary light concentrator, the optical axis of the concentrated light is aligned to optimize the numerical aperture of the concentrated light with a numerical aperture (NA) optimizer having a light guide to direct the concentrated light to an interior luminaire. The method of the low numerical aperture transmission of light has the advantages of fewer reflections in the light guide, low loss, low cost, and easy installation and operation.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: December 25, 2012
    Inventor: Bingwu Gu
  • Travel face pillow
    Patent number: 8205283
    Abstract: A travel face pillow provides a portable soft cushion for resting while supporting the head.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: June 26, 2012
    Inventor: Steven A Russell
  • Low numerical aperture (low-NA) solar lighting system
    Patent number: 8184372
    Abstract: A low numerical aperture (low-NA) light concentration and transmission system collects, concentrates and transmits light for interior illumination. A solar tracker aligns a primary light concentrator to collect light and direct the light to a secondary light concentrator and a filter for removing ultraviolet and infrared radiation. On exiting the secondary light concentrator, the optical axis of the concentrated light is aligned to optimize the numerical aperture of the concentrated light with a numerical aperture (NA) optimizer having a light guide to direct the concentrated light to an interior luminaire. The method of the low numerical aperture transmission of light has the advantages of fewer reflections in the light guide, low loss, low cost, and easy installation and operation.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 22, 2012
    Inventor: Bingwu Gu
  • Step-shaped staircase lift for personal use and transport of goods
    Patent number: 7484595
    Abstract: A lift using a step-shaped shaft for raising and lowering a person or goods on a platform over one or more steps from one elevation to another elevation. The lift is especially suited for use over porches and raised thresholds of buildings and in and out of vehicles. The lift is suitable for use by persons without or without a wheelchair.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: February 3, 2009
    Inventors: Scott Schroeder, Sharolyn Schroeder
  • Spoon with extendable straw
    Patent number: 7047648
    Abstract: An eating utensil for consumption of liquid, semi-liquid, semi-solid, and solid foodstuffs through the use of a combination spoon and straw.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: May 23, 2006
    Inventors: John P. LeBel, Rachel LeBel