US PATENT SUBCLASS 210 / 471
.~.~ Ring type

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

348  DF  FILTER {25}
470  DF  .~ Handled {1}
471.~.~ Ring type

DEFINITION

Classification: 210/471

(under subclass 470) Apparatus comprising a ring member fixedly attached to the filter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

495, for a ring and screen type filter element.