US PATENT SUBCLASS 701 / 216
.~.~.~.~ Having an self-contained position computing means (e.g., dead reckoning)

Current as of: June, 1999
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701 /   HD   DATA PROCESSING: VEHICLES, NAVIGATION, AND RELATIVE LOCATION

200  DF  NAVIGATION {8}
207  DF  .~ Employing position determining equipment {8}
213  DF  .~.~ Using Global Positioning System (GPS) {1}
214  DF  .~.~.~ Means to improve accuracy of position or location {2}
216.~.~.~.~ Having an self-contained position computing means (e.g., dead reckoning)

DEFINITION

Classification: 701/216

Having a self-contained position computing means (e.g., dead reckoning):

(under subclass 214) Method of correcting position data having a secondary system for independently calculating or indicating vehicle location for the substitution, modification, or verification of the GPS position data.

SEE OR SEARCH THIS CLASS, SUBCLASS:

217, for specific secondary system used.