US PATENT SUBCLASS 111 / 157
.~.~ Rotary opener

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
149  DF  .~ Furrow opener {7}
157.~.~ Rotary opener {2}
158  DF  .~.~.~> Power rotated {1}
163  DF  .~.~.~> Disk {3}

DEFINITION

Classification: 111/157

Rotary opener:

(under subclass 149) Apparatus wherein the opening element

turns, spins, or revolves about an axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

112+, for a rotary opener associated with plant setting.

121+, for a rotary opener associated with a liquid or gas soil treatment.

SEE OR SEARCH CLASS

172, Earth Working,

518+, for a rotating earth-working tool, per se.