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http://www.google.com/patents/US3589938?utm_source=gb-gplus-share
Patent US3589938 - FIG-IZ
FIG-IZ
John H. Blewett et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3589938
Filing date
: Jul 11, 1968
Issue date
: Jun 29, 1971
Plain text
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