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Title: Letter regarding using an invention before the patent is sealed [Go to resource]
Description: From Poole and Carpmael, Patent Agency License: http://creativecommons.org/licenses/by/2.0/uk/ Publisher: Sandwell Archives Rights holder: Sandwell Archives Subjects: Gorgeous Glass Temporal: 1851 Source: Black Country History Creator: Chance Brothers Identifier: http://www.blackcountryhistory.org/colle... Go to resource More Like this...
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