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http://www.google.com.au/patents/US2823665?utm_source=gb-gplus-share
Patent US2823665 - HEATING PAD
HEATING PAD
John D. Steinbach et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 2823665
Filing date
: 12 Sep 1955
Issue date
: 18 Feb 1958
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