Patents by Inventor Han Yao

Han Yao 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).

  • LOAD SENSITIVE SNOW BARRIER DEVICE
    Publication number: 20100192479
    Abstract: A snow-retaining device comprises a detachable upper member attached to a base anchor. The base anchor is adapted to be coupled to a roof. The upper member prevents snow from sliding off the roof during regular snow conditions. In order to prevent catastrophic damage to the roof, if a snow load on the roof exceeds a maximum threshold, the upper member detaches from the base anchor to allow some or all of the snow to slide off the roof. The device optionally integrates a snow melting device.
    Type: Application
    Filed: October 16, 2009
    Publication date: August 5, 2010
    Applicant: Roofers World Inc.
    Inventors: Craig Elliott, Gabrielle Pell, Cam Haszczyn, Robin Nelson, Han Yao
  • SEAM CLAMP
    Publication number: 20100058701
    Abstract: A seam clamp for attachment to a standing seam on a metal roof does not damage the seam during use. The clamp is easily assembled and disassembled by the user. Roofing accessories can be attached to the seam clamp.
    Type: Application
    Filed: March 6, 2009
    Publication date: March 11, 2010
    Applicant: Roofers World Inc.
    Inventors: Han Yao, Mark Sunderland, Jiri Krupka, Craig Elliot, Robin Nelson
  • Roofing bracket for supporting a platform
    Publication number: 20080302934
    Abstract: A base element for assembly of a roofing bracket comprises a fastening means for temporarily or attaching the base element to a metal or non-metal roof and an upper surface. The upper surface comprises a means for engagement of an underside of an upper member of the roofing bracket. The upper member can be selectively attached to the base element in a first or second position.
    Type: Application
    Filed: March 6, 2008
    Publication date: December 11, 2008
    Inventors: Robin Nelson, Jiri Krupka, Han Yao