US PATENT SUBCLASS 701 / 8
.~.~.~ Threshold or reference value

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

1  DF  VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION {19}
3  DF  .~ Aeronautical vehicle {4}
4  DF  .~.~ Altitude or attitude control or indication {6}
8.~.~.~ Threshold or reference value {1}
9  DF  .~.~.~.~> Warning signal or alarm

DEFINITION

Classification: 701/8

Threshold or reference value:

(under subclass 4) Altitude or attitude control or indication further comprising a predetermined or operator determined altitude or attitude setting.