US PATENT SUBCLASS 172 / 130
.~ Multiple interconnected markers

Current as of: June, 1999
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172 /   HD   EARTH WORKING

126  DF  WITH EARTH MARKER {5}
130.~ Multiple interconnected markers {1}
131  DF  .~.~> Markers on laterally shiftable member

DEFINITION

Classification: 172/130

(under subclass 126) Apparatus wherein plural markers are provided and interconnected such that when one marker is adjusted to operative position, the other marker is simultaneously moved to inoperative position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

127, for interconnected markers shiftable on turning.

128, for interconnected markers shiftable on lifting the earth working device.

204+, for apparatus comprising earth working tools alternating for right or left hand operation.