Patents by Inventor John R. Rumpf

John R. Rumpf 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).

  • Tile board for constructing ceramic tile sheets
    Patent number: 3963232
    Abstract: A device useful in the manufacture of ceramic tile sheets is provided, having a peripheral rim along three edges of a rectangular backer board structure. The fourth peripheral edge of the backer board structure is open to permit insertion of individual tile pieces and removal of an integral tile sheet. One of the closed edges is movably mounted to the backer board structure, and includes handle means for manipulating the movable edge of the device. The handle means also functions as an alignment means for the movable edge.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: June 15, 1976
    Inventor: John R. Rumpf