US PATENT SUBCLASS 15 / 330
.~.~.~ Suction to or from blast

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}
328  DF  .~.~ Convertible {4}
330.~.~.~ Suction to or from blast

DEFINITION

Classification: 15/330

(under subclass 328) Apparatus having provisions for applying selectively and alternatively suction of air blast.