US PATENT SUBCLASS 172 / 148
.~.~ Longitudinally spaced like implements with intermediate diverse implement (A, B, A)


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172 /   HD   EARTH WORKING

133  DF  DIVERSE TOOLS {29}
145  DF  .~ Three or more diverse implements following same path (A, B, C, or A, B, A,) {3}
148.~.~ Longitudinally spaced like implements with intermediate diverse implement (A, B, A)


DEFINITION

Classification: 172/148

(under subclass 145) Apparatus in which the first and third implements in the direction of travel are alike and the intermediate or second implement is of a different type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for four or more implements following the same path which are alternately alike, but successively unlike.

155+, for laterally spaced like implements with an intermediate unlike implement.