Patents by Inventor Leopold Wimmer

Leopold Wimmer 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).

  • Ground station for a VOR navigation system with means for identifying spurious responses at a remote VOR receiver
    Patent number: 4017861
    Abstract: A ground station for VOR navigation systems with at least one transmitter and several radiators, which ground station radiates azimuth-dependent and azimuth-independent information. The azimuth-dependent information consists of the wave amplitude-modulated with 30 Hz in the field and generated by the superposition of the nondirectionally radiated VHF carrier on a VHF figure-8 directional pattern rotating at 30 Hz. The azimuth-independent reference wave consists of a 30-Hz wave which is contained as frequency modulated in a 9,960-Hz subcarrier wave amplitude-modulated on the VHF carrier.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: April 12, 1977
    Assignee: International Standard Electric Corporation
    Inventors: Leopold Wimmer, Gunter Hofgen, Werner Poschadel