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http://www.google.com.au/patents/US3837455?utm_source=gb-gplus-share
Patent US3837455 - SYSTEM AND METHOD FOR CUSTOMER
SYSTEM AND METHOD FOR CUSTOMER
Arthur J. Hurt et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3837455
Filing date
: 10 Oct 1972
Issue date
: 1974
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