Patents by Inventor Rudolf Waninger

Rudolf Waninger 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).

  • Household coffee machine with calcification indicator
    Patent number: 4122763
    Abstract: A coffee making machine having a calcification indicator system which turns an indicator device on and off to warn of the presence of calcine deposits in the water flow path of a flow heater is disclosed. The coffee machine calcification indicator system includes a glow lamp in a circuit arrangement with a signal flasher circuit. At least a portion of the calcification indicator system is connected in a parallel circuit arrangement with a heater thermostat switch. A calcification indicator switch is actuated at a time dependent upon the conclusion of the coffee making process to disable the operation of the calcification indicator device.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: October 31, 1978
    Assignee: Wigo Gottlob Widmann & Soehne GmbH & Co. KG
    Inventors: Rudolf Waninger, Frank Obrowski