Patents by Inventor Shu Lan Ma

Shu Lan Ma 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).

  • Unitary body swiveling hoist ring and method of manufacture
    Patent number: 6749237
    Abstract: An improved hoist ring and method of manufacturing a hoist ring having a generally U shaped ring member and two substantially parallel legs. A pair of apertures communicated through the parallel legs and rotationally engage a pair of elongated shoulders protruding from a body member. A taper in the upper wall surface of the apertures allows the ring member to be inserted over the shoulders and then bent to a U shape to form the device and also allows for the assembly of the device from two unitary structures.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: June 15, 2004
    Inventor: Shu Lan Ma