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Derwent World Patents Index

  Link Details for: Derwent World Patents Index
Link Title: Derwent World Patents Index Open in a new window
Link URL: http://scientific.thomson.com/products/dwpi/
Link Details: Comprehensive database of value-added patent documents. 1.5 million patent documents from 41 patent-issuing authorities are added into the database each year.
Category: Top : Science : Chemistry : Chemical_Databases
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Derwent World Patents Index