Patents by Inventor Donald Ritzer

Donald Ritzer 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).

  • Publication number: 20040226230
    Abstract: The invention consists of a premoulded frame that gets secured to a substrate or hung from supports independently. This premoulded frame has indentions that from a waterproof fit when properly shaped tiles are installed.
    Type: Application
    Filed: May 16, 2003
    Publication date: November 18, 2004
    Inventor: Donald Ritzer
  • Patent number: 6751916
    Abstract: The invention comprises an apertured frame secured to a substrate and having a slotted arrangement adapted to receive and secure properly shaped tiles.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: June 22, 2004
    Inventors: Sandy A. Ritzer, Donald Ritzer
  • Publication number: 20040093819
    Abstract: The invention consists of a back liner panel with pre-formed ribs to secured to a substrate to receive properly shaped tiles.
    Type: Application
    Filed: November 20, 2002
    Publication date: May 20, 2004
    Inventor: Donald Ritzer