Description:

Derwent World Patents Index® (Non-subscriber file: WPINDEX; Subscriber file: WPIDS; Subscriber file with Extension Abstracts: WPIX) provides information on patent publications from the 41 most important patent issuing authorities of the world.
Access to files WPIDS and WPIX are subject to a relevant subscription with Thomson Reuters (Scientific) UK Ltd.
Each record in the database describes a patent family, starting with the new invention (Basic Patent) and adding information about the same invention issued in other countries (Equivalents).
Two levels of data are available within the database for each record.
The Invention Level comprises bibliographic data and Thomson Reuters (Professional) UK Ltd value-added titles, abstracts, general and where appropriate, indepth chemical and electrical indexing.  Thomson Reuters (Professional) UK Ltd applies various algorithms to collate and deduplicate the data from the individual member patents of the patent family when creating this ‘Patent Family’ (Invention Level) view.
The Member Patent Level (or Publication Level) on the other hand allows users to search and display bibliographic data and general indexing information associated with individual documents that make up the patent family Invention Level. This can allow very specific searching of individual documents. Additional data elements such as original titles and abstracts, claims, address and agent information are also present at the Member Patent Level.
The Invention and Member Patent Levels can be searched individually or in combination as required.
Electrical and engineering drawings may be present in records dating back to 1988, and chemical structure drawings may be present in records dating back to 1992.  
Beginning with Update 1999-08, two Thomson Reuters (Professional) UK Ltd value-added content fields, Novelty (NOV) and Technology Focus (TECH), were added. The Novelty field outlines the novelty of the invention. The Technology Focus provides further information to the Basic (Alert) Abstract (AB), describing the invention from different technological viewpoints, thus helping to present the practical scientific content of the patent in a more easily understood form.
An optional Extension Abstract field was also introduced from Update 1999-08. This should be read in conjunction with the Basic (Alert) Abstract (AB) and Technology Focus (TECH) to provide an even more detailed summary of the invention.
A Documentation Abstract, the pre­cursor of the Extension Abstract, may be available for records between 1995-1999.
Both Extension Abstracts and Documentation Abstracts can only be viewed by eligible subscribers within WPIX.
Derwent Chemistry Resource (DCR), available beginning with Update 1999-16, offers structure searching and various other substance identification and indexing fields. DCR search results are linked to bibliographic records.
Online thesauri are available for various Indexing and Coding fields including the IPC and CPC as well as for patent assignees.
LWPI is the low cost companion training file for the WPIDS/WPIX/WPINDEX files (images included).

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