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http://www.google.com.au/patents/US3710948?utm_source=gb-gplus-share
Patent US3710948 - SELF-SUSTAINING POCKET TYPE FILTER
SELF-SUSTAINING POCKET TYPE FILTER
Robert W. Sexton et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3710948
Filing date
: 10 Jun 1970
Issue date
: 6 Jan 1973
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