US PATENT SUBCLASS 701 / 214
.~.~.~ Means to improve accuracy of position or location

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.~.~.~ Means to improve accuracy of position or location {2}
215  DF  .~.~.~.~> Having multiple GPS antennas or receivers (e.g., differential GPS)
216  DF  .~.~.~.~> Having an self-contained position computing means (e.g., dead reckoning)

DEFINITION

Classification: 701/214

Means to improve accuracy of position or location:

(under subclass 213) Global positioning system wherein the electrical data processing system or calculating computer utilizes a secondary or supplemental means to more exactly indicate a vehicle's locale.