Patents by Inventor Ulrich Hirsch

Ulrich Hirsch 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).

  • Filter arrangement for cathode ray tube
    Patent number: 4247871
    Abstract: A color filter is placed between the face of a cathode ray tube display unit and a matt black gauze to produce an amber-colored image background. This highlights yellow data characters. The filter is a curved acrylic glass pane either bonded to the tube face in spaced relation or secured thereto by means of a sealing gasket of unique design and construction.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: January 27, 1981
    Assignee: Nixdorf Computer AG
    Inventors: Ulrich Hirsch, Walter Hardt
  • Heat-system controller
    Patent number: D712756
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 9, 2014
    Assignee: Oventrop GmbH & Co.KG
    Inventors: Georg Rump, Ulrich Hirsch
  • Thermostat
    Patent number: D762498
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: August 2, 2016
    Assignee: OVENTROP GMBH & CO. KG
    Inventors: Ulrich Hirsch, Bernd Abel