US PATENT SUBCLASS 92 / 236
.~.~.~.~ With additional angularly related slit

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

172  DF  PISTON {19}
208  DF  .~ Open-ended hollow skirt type (e.g., trunk type) {15}
234  DF  .~.~ Skirt includes slit {1}
235  DF  .~.~.~ Slit transverse to skirt axis {1}
236.~.~.~.~ With additional angularly related slit

DEFINITION

Classification: 92/236

(under subclass 235) Apparatus including another elongated relatively narrow aperture extending in a direction which lies at an angle to the direction of the first aperture.