Derwent World Patents Index

The most comprehensive global collection of curated patent abstracts.

DWPI Reference Center

Complex patent information simplified.

Derwent World Patents Index™ (DWPI) is the world’s most comprehensive database of enhanced patent information.   Subject experts from Derwent’s editorial team analyze, abstract and manually index every patent record, making it easier for you to quickly find the information you need to make informed decisions. In DWPI, the use and advantage of a patent are clearly stated – not buried within an original patent document.

The Derwent World Patents Index is used every day around the world by patent professionals – from examiners to innovators and the attorneys who support them.

Everyone involved in innovation at Whirlpool Corporation benefits from analysis powered by DWPI. It’s the best tool for timely review and provides a quick grasp of patent information for our technology organization.
Steve Kuehl

Principal Technologist & Global IP Coordinator,

Whirlpool Corporation

The global standard in curated patent data.

Derwent’s editorial team comprised of domain experts spanning various technologies, provide clear titles and abstracts summarizing the novelty of the invention as well as correct errors in bibliographic data. Unique coding and indexing is also applied to every DWPI record.
More than 40 patent offices around the world provide us with their raw patent data and then purchase it back further enriched as a DWPI record to examine patent applications.

DWPI provides the most extensive view of patent activity in emerging and growing markets by providing the world’s most comprehensive collection of global patent data in English – more than 62 authorities covering over 30 languages. Nearly 86% of abstracted records in DWPI originate from non-English patent records.

Searching patents from many authorities can create massive data overload. DWPI patent families ensure you don’t encounter duplicate inventions. Our invention-based records allow you to see the full global protection for a single invention, instead of one record per patent – saving you valuable research time.

DWPI uses unbiased coding and indexing systems, which are intellectually and consistently applied across all patent authorities and technologies. Our unique coding and indexing system applies 20+ sections of Derwent classification and over 25K active manual codes to every record, providing unsurpassed searchability.

Within DWPI, users can easily conduct targeted searches of chemical patent data in the Chemical Patent Index (CPI). This data is also available through DWPI on STN.

DPCI provides an invention-level view of patent and literature citations, forward and backward and allows you to obtain all citations relevant to inventions or patent families. This unique lens on patent data allows you to gather comprehensive patent lists faster, freeing time and resources.

DWPI powers global innovation.


priority errors captured and corrected each week

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of documents we receive need errors corrected

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patent families

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patent offices worldwide use DWPI

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technical and patent editors

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abstracts a year

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