Patents by Inventor Marshall W. Curtis

Marshall W. Curtis 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).

  • Fastener apparatus with self-leveling head
    Patent number: 10221882
    Abstract: Fastener apparatus including a self-adjusting and automatically self-leveling head separate from a threaded shank portion. An embodiment self-leveling head portion defines an annular recess and lip portion sized to receive a seal. A threaded shank resides within an annular cup center of the self-leveling head and has a thread-free portion seated by the compressed seal creating a water tight seal. Embodiments for sheet metal screw and bolt fasteners not requiring seals are disclosed.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: March 5, 2019
    Assignee: Dream Weaver, LLC
    Inventors: David A. W. Curtis, Marshall W. Curtis
  • Fastener apparatus with self-leveling head
    Patent number: 9447814
    Abstract: Fastener apparatus including a self-adjusting and automatically self-leveling head separate from a threaded shank portion. An embodiment self-leveling head portion defines an annular recess and lip portion sized to receive a seal. A threaded shank resides within an annular cup center of the self-leveling head and has a thread-free portion seated by the compressed seal creating a water tight seal. Embodiments for sheet metal screw and bolt fasteners not requiring seals are disclosed.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: September 20, 2016
    Assignee: DREAM WEAVER, LLC
    Inventors: David A. W. Curtis, Marshall W. Curtis
  • Fastener apparatus with self-leveling head
    Patent number: 8708630
    Abstract: Fastener apparatus including a self-adjusting and automatically self-leveling head separate from a threaded shank portion. An embodiment self-leveling head portion defines an annular conical recess and lip portion sized to receive a seal. A threaded shank resides within an annular cup center of the self-leveling head and has a thread-free portion seated by the compressed seal creating a water tight seal. Embodiments for sheet metal screw and bolt fasteners not requiring seals are disclosed.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: April 29, 2014
    Inventors: David A. W. Curtis, Marshall W. Curtis