US PATENT SUBCLASS 89 / 193
.~.~ Gas ports and/or regulators

Current as of: June, 1999
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89 /   HD   ORDNANCE

125  DF  AUTOMATIC {14}
191.01  DF  .~ Gas piston type {3}
193.~.~ Gas ports and/or regulators

DEFINITION

Classification: 89/193

(under subclass 191) Guns with specific gas ports, cylinders and/or regulators.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits,

37+, for regulators, per se.

251, Valves and Valve Actuation, appropriate subclasses for valve structure, per se.