DWPI Reference Center

Derwent World Patents Index (DWPI) is the world’s most comprehensive database of enhanced patent documents. Subject experts from Derwent analyze, abstract and manually index every patent record, making it easier for you to quickly find the information you need to make informed decisions. Whether you are interested in patents for their technical content, for business planning and development, or for protecting the innovations within your own organization — DWPI gives you the most complete picture possible.

DWPI contains over 40.3 million patent families covering more than 82.8 million patent documents, with coverage from 61 worldwide patent authorities and 2 literature sources (May 2019).

DWPI provides unparalleled access to the world’s patent literature with full coverage of agricultural and veterinary medicine, electronic/electrical engineering, chemistry, pharmaceuticals and polymers.

Resources

DWPI Summary

DWPI Classification System

DWPI country/region coverage

DWPI Patent Assignee codes

DWPI Patent assignee code lookup

DWPI indexing and user guides

DWPI manual codes

Engineering User Guides

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