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The invention provides method for the evaluation of washing or cleaning techniques on a substrate comprising:...
http://www.google.co.uk/patents/US6814816?utm_source=gb-gplus-share
Patent US6814816 - Indicator kit
Indicator kit
Sudhir Achar et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 6814816
Filing date
: 3 Oct 2003
Issue date
: 9 Nov 2004
Application number
: 10/678,559
Plain text
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