US PATENT SUBCLASS 244 / 138 R
SAFETY LOWERING DEVICES

Current as of: June, 1999
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244 /   HD   AERONAUTICS

138 RSAFETY LOWERING DEVICES {4}
139  DF  .~> Entire aircraft
140  DF  .~> Passenger compartment {1}
142  DF  .~> Parachutes {7}
138 A  DF  .~> Rotating vanes

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 244/138

(under the class definition) Devices for safely lowering persons, cargo or aircraft structure to the ground.

SEE OR SEARCH THIS CLASS, SUBCLASS:

137.1+, and see the notes thereto for loading and unloading of aircraft in general when no safety lowering features are claimed.