Patents by Inventor Sigurd Haeusler

Sigurd Haeusler 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).

  • Process and apparatus for noise reduction in multi-engine propeller-driven aircraft
    Patent number: 6896219
    Abstract: A process and system for noise reduction in multi-engine propeller-driven aircraft. The parameters of at least two propellers are adjusted with regard to frequency, amplitude, and phase so that the sound fields of the propellers are attenuated or completely extinguished by interference in the area of the closest aircraft fuselage.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: May 24, 2005
    Assignee: Dornier GmbH
    Inventors: Ingo Udo Borchers, Sigurd Haeusler, Michael Bauer, Roger Drobietz, Wolfgang Gleine
  • Process and apparatus for noise reduction in multi-engine propeller-driven aircraft
    Publication number: 20040018086
    Abstract: A process and system for noise reduction in multi-engine propeller-driven aircraft is disclosed. The parameters of at least two propellers are adjusted with regard to frequency, amplitude, and phase so that the sound fields of the propellers are attenuated or completely extinguished by interference in the area of the closest aircraft fuselage.
    Type: Application
    Filed: March 19, 2003
    Publication date: January 29, 2004
    Inventors: Ingo Udo Borchers, Sigurd Haeusler, Michael Bauer, Roger Drobietz, Wolfgang Gleine