Patents by Inventor Ferman L. Walker

Ferman L. Walker 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).

  • Aircraft ground closure rate filtering method and means
    Patent number: 4016565
    Abstract: Ground closure rate between an aircraft and underlying terrain is obtained by differentially combining a radio altimeter derived rate signal and a barometric altitude rate signal to obtain a rate of change of ground profile signal. The ground profile rate is filtered on an autocorrelation basis to obtain a profile rate signal devoid of amplitude pulses introduced by sharp or discontinuous terrain features and recombined with barometric rate to obtain ground closure rate. The filtering technique imposes no rate limitation on the radio rate signal.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: April 5, 1977
    Assignee: Rockwell International Corporation
    Inventor: Ferman L. Walker