US PATENT SUBCLASS 15 / 230.18
.~.~.~.~ Working surface dished inwardly or outwardly

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

104.001  DF  IMPLEMENTS {28}
208  DF  .~ Fabric {1}
209.1  DF  .~.~ Wiper, dauber, or polisher {12}
230  DF  .~.~.~ Rotary {10}
230.18.~.~.~.~ Working surface dished inwardly or outwardly

DEFINITION

Classification: 15/230.18

(under subclass 230) Implement which includes a working portion having a work-contacting face the shape of which is bulged or hollowed relative to the implement whereby any cross-section taken through the shape is bounded by a curved line at the work-engaging face of the shape.

(1) Note. An implement having a cylindrical or planar or irregular work engaging face is excluded and will be found in other subclasses (e.g., subclass 230) of this schedule.