Derwent Patents Citation Index

Access family-based patent citations

Derwent Patents Citation Index is a unique database

Derwent Patents Citation Index contains citations of patents and literature during the determination of patentability. DPCI citation makes it easy to find patents that are closely related, or to identify patents that are highly influential in a technology space.


million backward citations


million forward citations


million literature citations

What makes DPCI unique

Derwent Patents Citation Index is an invaluable tool for IP and business professionals to quickly find closely related patents for licensing, litigation and portfolio analysis.  It allows more precise searches, improving efficiency and ultimately saving time and effort.

Patents and literature including those referenced by the examiner, inventor/author, or opposition/third party during the determination of patentability.

Authorities from 32 countries.

Citation data from all family members in a single record, providing a representation of the invention level citations; massive savings in time and effort.

Value-added Derwent World Patents Index  Assignees and PACO codes to make it easier to find relevant organisations.

Citation count
Allow you to compare patents very simply to identify more influential patents.

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