US PATENT SUBCLASS 16 / 58
.~.~ Oscillating piston

Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

49  DF  CHECKS AND CLOSERS {6}
51  DF  .~ Liquid {8}
58.~.~ Oscillating piston

DEFINITION

Classification: 16/58

(under subclass 51) Devices including cylinders having oscillating pistons.