Derwent innovations index
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About this resource
Comprehensive database of international patent information, with over 20 million patents worldwide from 1963. Covers: chemical, electronic and electrical engineering, and mechanical engineering.
- Data Format:
- Frequency of updates: Updated weekly
Subject headings
Chemical engineering--Patents--Indexes.
Chemistry--Indexes.--Patents
Electronic apparatus and appliances--Patents--Indexes.
Electric engineering--Patents--Indexes.
Mechanical engineering--Patents--Indexes.
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