US PATENT SUBCLASS 418 / 201.3
.~.~ Having specific tooth shape

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

191  DF  INTERENGAGING ROTATING MEMBERS {9}
201.1  DF  .~ Helical or herringbone {4}
201.3.~.~ Having specific tooth shape

DEFINITION

Classification: 418/201.3

Having specific tooth shape:

(under subclass 201.1) Apparatus wherein the teeth or ribs and grooves have an explicitly set forth form.