Patents by Inventor Sam H.-S. Chen

Sam H.-S. Chen 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).

  • Patent number: 5507541
    Abstract: A ball retrieval cart generally comprising a wheeled container for retrieving and storing balls and a pair of handles attached thereto. The container is rollingly supported by wheels on an axle. The container has a bottom including rails defining ball retrieval slots through which balls on the ground pass into the container when the rails are lowered over the balls. The handles, a front handle and a rear handle, are pivotally attached to the cart. A connector can be used to attach the handles together such that the position of the rear handle relative to the container can be adjustably fixed as desired by a user such that user can pivot the cart about the axle to raise and lower the bottom for retrieving balls. The handles are rotatable, also, to a substantially vertical support position supporting the cart in a ball dispensing position. The handles are rotatable, also, to above the cart such that they may be jointly gripped by a user as a carrying handle.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: April 16, 1996
    Inventors: Sam H.-S. Chen, Shunder Chang, East White