US PATENT SUBCLASS 15 / 318.1
.~.~.~.~ Sequence control

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}
301  DF  .~.~ Fixed position cleaners or installed cleaning systems {6}
316.1  DF  .~.~.~ Air blast only (e.g., boiler soot-blower) {3}
318.1.~.~.~.~ Sequence control

DEFINITION

Classification: 15/318.1

Sequence control:

(under subclass 316.1) Subject matter comprising means performing two or more operations (e.g., two or more air blowers, a blower and a work mover, etc.) and means to control the time or order of the operations.