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http://www.google.co.uk/patents/US2649306?utm_source=gb-gplus-share
Patent US2649306 - SKIHAKNESS
SKIHAKNESS
A. C. HILDLNG et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 2649306
Filing date
: 13 Jul 1951
Issue date
: 18 Aug 1953
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