Patents by Inventor James E. Terpstra

James E. Terpstra 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).

  • Method of operation of a navigational calculator
    Patent number: 5313396
    Abstract: The present invention provides a method of communicating information between a navigational computer and a user by the input and output devices associated with the navigational computer to determine a navigational parameter. The method includes the step of using the input device to select a navigational parameter whose value is to be determined by the navigational calculator. The preferred method includes the step of using the output device to display all of the variables required to calculate the selected navigational parameter. Also included in the method of the present invention is the step of using the input device to define the values associated with the variables necessary to calculate the selected navigational parameter in any order that is convenient to the user. Moreover, the user can change the value associated with a variable until the desired value is attained without having to redefine the values associated with other variables.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: May 17, 1994
    Assignee: Jeppesen Sanderson, Inc.
    Inventors: James E. Terpstra, Donald R. Sellars, William A. King, Jr., Karel R. Hajda