Patents by Inventor Hellmuth Bollman

Hellmuth Bollman 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: 4208957
    Abstract: A coffee maker has a reservoir for water connected to a conduit which terminates above a holder for coffee grounds which sits atop a coffee carafe. A heater is provided in this conduit which can heat the water therein and displace it along the conduit into the coffee-ground holder. The heater is energized for a brief period of time to supply a small quantity of the water to the coffee-ground holder, and is then shut down so that this limited quantity of water can brew with and pass through the ground coffee. Thereafter the heater is again energized to heat and displace the rest of the liquid in the reservoir into the holder.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: June 24, 1980
    Assignee: Braun Aktiengesellschaft
    Inventors: Hellmuth Bollman, Ernst Heimrath