US PATENT SUBCLASS 15 / 397
.~.~.~.~.~ With tubular air nozzles interspersed throughout work contacting surface

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
363  DF  .~.~ With mechanical agitating means {12}
393  DF  .~.~.~ Stationary agitator {6}
396  DF  .~.~.~.~ Hollow head with perforate reticulate supporting surface for agitator {1}
397.~.~.~.~.~ With tubular air nozzles interspersed throughout work contacting surface

DEFINITION

Classification: 15/397

(under subclass 396) Apparatus having tubular air ducts communicating with the manifold openings and interspersed throughout the working face of the apparatus.