Derwent Innovations Index

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Coverage: 
1963 -
Derwent Innovations Index combines unique value-added patent information indexed from over 50 patent issuing authorities in the Derwent World Patent Index (1963-present) with patent citations indexed from the Derwent Patents Citation Index (1973-present). It includes: Chemical Section --1963-present, Electrical and Electronic Section --1963-present, Engineering Section --1996-present