US PATENT SUBCLASS 4 / 289
.~ Strainers in series

Current as of: June, 1999
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4 /   HD   BATHS, CLOSETS, SINKS, AND SPITTOONS

286  DF  STRAINER, STOPPER, PLUG OR CLOSURE {7}
289.~ Strainers in series

DEFINITION

Classification: 4/289

The water passes through a plurality of strainers arranged in series.