Patents by Inventor Martin F. Wiedemann

Martin F. Wiedemann 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).

  • Patent number: 5031241
    Abstract: A fashion preserving bib is disclosed which is formed of a substantially transparent plastic sheet of material. The bib has a pocket along the lower edge with an upwardly open edge adjacent the outer surface of the sheet, such that the pocket would be positioned to catch food drippings when the bib is attached by adhesive regions at each upper corner of an inner surface of the sheet to a frontal region of a garment of a person. The pocket along the lower edge of the bib is spaced open by means of one or more spacers, such that an outer flap of the pocket does not close when the bib conforms to the curvature of the body of its wearer. A respective spacer is preferably of a polyurethane material, and at least one spacer is attached centered on the lateral length of the flap adjacent an upper edge thereof. An absorbent material is disposed in the pocket along its bottom and across the width of the bib, such that liquids running into the pocket may be absorbed thereby and retained within the pocket.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: July 16, 1991
    Inventor: Martin F. Wiedemann
  • Patent number: 4855569
    Abstract: An electric water heater for preformed spas and baptismal pools includes an elongated horizontally disposed tubular heat exchanger having a water inlet in a first end wall and a water outlet adjacent the opposite second end wall and defining a water flow path provided with an electric heating element extending longitudinally therethrough from the first end wall for heating the water. A pump having an inlet communicating with the flow path through the second end wall has a first outlet directing some of the water from the flow path to the heat exchanger outlet in a direction away from the heat exchanger to provide a venturi action causing additional water to flow directly out the heat exchanger outlet without passing through the pump and a second outlet which directs a small counterflow of water into the heat exchanger towards the first end wall to break up and keep in circulation scale and sediment.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: August 8, 1989
    Inventor: Martin F. Wiedemann