US PATENT SUBCLASS 111 / 182
.~.~.~.~.~ Protrusions on drum pheriphery

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
170  DF  .~ Having depositor feature {5}
177  DF  .~.~ Rotating dispensing element {2}
178  DF  .~.~.~ Roll or drum {1}
179  DF  .~.~.~.~ Air pressure differential drum {3}
182.~.~.~.~.~ Protrusions on drum pheriphery

DEFINITION

Classification: 111/182

Protrusions on drum periphery:

(under subclass 179) Apparatus further including members which extend radially outwardly from the drum periphery and through which the air pressure differential is expressed.