Patents by Inventor Alf U. Hackenberg

Alf U. Hackenberg 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).

  • Portable communication device
    Patent number: D439230
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: March 20, 2001
    Assignee: Motorola, Inc.
    Inventors: Thomas Ray Braxton, Charles E. Staron, Mark William McIntosh, Jan Hippen, I Chiang Sun, Alf U. Hackenberg
  • Speaker grille
    Patent number: D509499
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: September 13, 2005
    Assignee: Logitech Europe S.A.
    Inventors: Wells Brimhall, Raymond Weikel, Donald Mayette, Omer Kotzer, Alf U. Hackenberg, Martin Langkau, Andreas Schuessler
  • Speaker controller
    Patent number: D510338
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: October 4, 2005
    Assignee: Logitech Europe S.A.
    Inventors: Wells Brimhall, Raymond Weikel, Alexander S. Danielson, Omer Kotzer, Alf U. Hackenberg, Martin Langkau, Andreas Schuessler
  • Speaker
    Patent number: D510340
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: October 4, 2005
    Assignee: Logitech Europe S.A.
    Inventors: Wells Brimhall, Raymond Weikel, Donald Mayette, Omer Kotzer, Alf U. Hackenberg, Martin Langkau, Andreas Schuessler
  • Speaker
    Patent number: D512413
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: December 6, 2005
    Assignee: Logitech Europe S.A.
    Inventors: Wells Brimhall, Raymond Weikel, Greggory P. Smith, Omer Kotzer, Alf U. Hackenberg, Martin Langkau, Andreas Schuessler