US PATENT SUBCLASS 81 / 439
.~.~ Including discrete, separately usable inserted portions

Current as of: June, 1999
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52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
436  DF  .~ Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver) {10}
439.~.~ Including discrete, separately usable inserted portions {1}
440  DF  .~.~.~> Pivotally or rotatably mounted

DEFINITION

Classification: 81/439

Including discrete, separately usable, inserted portions:

(under subclass 436) Wrench or screwdriver including at least two discrete, cavity-engaging and strain-exerting portions which are intended to be used during separate strain-exerting operations.

(1) Note. The strain-exerting portions are in some instances intended to be capable of cooperating together in a single strain-exerting operation.