US PATENT SUBCLASS 29 / 81.13
.~ Mechanically powered operator

Current as of: June, 1999
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29 /   HD   METAL WORKING

81.01  DF  SCALE REMOVER OR PREVENTOR {9}
81.13.~ Mechanically powered operator {3}
81.14  DF  .~.~> Tack or needle type
81.15  DF  .~.~> Hammer
81.16  DF  .~.~> Blade or chisel

DEFINITION

Classification: 29/81.13

Mechanically powered operator:

(under subclass 81.01) Process or apparatus wherein a mechanically driven work contacting member removes the scale.