Patents by Inventor Ernst Imfeld

Ernst Imfeld 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).

  • Automatic tea-making machine
    Patent number: 6324964
    Abstract: According to the invention the tea strainer and propeller of a stirrer are arranged in the tea-preparation chamber in a cooperating manner in such a way that the water flow minimizes the tea-brewing time. A tea-making machine fitted with such a tea-preparation chamber makes it possible for the first time to prepare any kind of tea automatically and very quickly.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: December 4, 2001
    Inventors: Anton Niederberger, Roger Schelbert, Ernst Imfeld, Guido Singer