Patents by Inventor Robin L. Sheaffer

Robin L. Sheaffer 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).

  • Coaster and wipe
    Patent number: 4953823
    Abstract: A coaster with the attributes of a wipe wherein two layers of absorbent material such as paper are separated by spacers. As the condensation collects on the upper absorbent layer, it sags and creates air pockets preventing the wet glass from sticking to the coaster. Through judicious choices in the spacers, the resulting coaster can be as flexible as a paper napkin or can be used for entertainment.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: September 4, 1990
    Inventors: William G. Sheaffer, Robin L. Sheaffer