US PATENT SUBCLASS 172 / 707
.~.~ Spring formed tool or standard

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
705  DF  .~ Spring biased or formed tool or tool part {5}
707.~.~ Spring formed tool or standard {1}
708  DF  .~.~.~> With separate or rigid earth working portion

DEFINITION

Classification: 172/707

(under subclass 705) Apparatus in which the earth working element or the immediate supporting means for an earth working element are formed of resilient material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

142, for diverse tools one of which is a spring tooth or standard.

624, for a spring-formed tool standard mounted on a rotating carrier.

627, for spring teeth mounted on a rotating carrier.

643, for plural spring-formed teeth or standards.

SEE OR SEARCH CLASS 111, Planting,

155, for a resilient tooth or similar-type opener claimed in combination with a planting machine.