Patents by Inventor Hartmut Groll

Hartmut Groll 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 block
    Patent number: 4566235
    Abstract: A tile for covering surface areas such as floors and walls has a tile surface and beneath the tile surface a body portion having side walls extending perpendicularly from the tile surface edges so as to form a tile block and the body portion has channels formed therein so as to extend thereacross to form channels in which pipes or cables may be disposed or through which a heating medium may be conducted for heating the block and the room laid out with such tile blocks.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: January 28, 1986
    Inventor: Hartmut Groll