US PATENT SUBCLASS 244 / 99
.~.~ Gas release

Current as of: June, 1999
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244 /   HD   AERONAUTICS

75 R  DF  AIRCRAFT CONTROL {8}
96  DF  .~ Airship control {3}
99.~.~ Gas release

DEFINITION

Classification: 244/99

(under subclass 96) Devices and arrangements for releasing the buoyant gas from lighter-than-air craft.