Patents by Inventor Karl Bieri

Karl Bieri 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).

  • Brewing apparatus for beverage-brewing machine
    Patent number: 4036121
    Abstract: An apparatus for brewing beverages from a ground or powdered substance comprises a movable intermediate member for conveying the substance to a stationary brewing chamber while simultaneously ensuring proper sealing of the chamber and measurement of the substance.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: July 19, 1977
    Assignee: Hagezet-Aktiengesellschaft
    Inventor: Karl Bieri
  • Brewing container for a beverage brewing machine
    Patent number: 3977313
    Abstract: A container in which a beverage may be brewed from a ground or powdered substance comprises a sealing piston having surfaces of different sizes upon which hot water impinges during the brewing operation, thus creating a pressure differential which ensures proper sealing between the stationary body and the movable head of the container.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: August 31, 1976
    Assignee: Hagezet-Aktiengesellschaft
    Inventor: Karl Bieri