Patents by Inventor Marianne E. Crabtree

Marianne E. Crabtree 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).

  • Sponge incorporating hand grasp
    Patent number: 5791008
    Abstract: The sponge incorporates a sponge block and a hand grasp which may either be an integral part of the sponge block or may be a separate member fixed to the sponge block in a predefined manner. The grasp is configured to resemble a butterfly winged element, flexible about a center area thereof which is fixed to a surface of the sponge block opposite a contact surface of the sponge block.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: August 11, 1998
    Inventor: Marianne E. Crabtree