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http://www.google.co.uk/patents/US3145515?utm_source=gb-gplus-share
Patent US3145515 - MANUFACTURE OF MULTI-LAYER INSULATED STRUCTURE
MANUFACTURE OF MULTI-LAYER INSULATED STRUCTURE
Leo J. Clapsadle et al
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Abstract
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Description
Claims
Patent number
: 3145515
Filing date
: 24 Apr 1962
Issue date
: 25 Aug 1964
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