US PATENT SUBCLASS 15 / 44
.~.~.~.~ Dust laying

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

3  DF  MACHINES {11}
21.1  DF  .~ Brushing {18}
40  DF  .~.~ Flexible-fabric cleaners {1}
41.1  DF  .~.~.~ Carpet sweeper {9}
44.~.~.~.~ Dust laying

DEFINITION

Classification: 15/44

Machines having no other cleaning instruments than brushes, and having also means for preventing the raising of dust in the sweeping operation.