Derwent World Patents Index
Celebrating its 55th anniversary in 2018, Derwent World Patents Index (DWPISM), produced by Clarivate Analytics, provides access to information for over 37.4 million inventions covering more than 100 million patent documents worldwide. Each update adds an average of 46,000 documents from more than 50 worldwide sources including patent issuing authorities and and defensive publications.
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’s reliable and enhanced patent data contains many key features that distinguish it as the most trusted source of patent research information available and gives you the most complete picture possible.
The DWPISM documents go through an extensive editorial process. Raw data is reviewed and corrected for mistakes and missing information. On average, DWPISM editors identify and correct 800-1,000 priority errors per week from raw patent data records. Each document represents a single invention or “patent family”. The patent family includes the first publication of an invention, also known as the “basic patent”, plus later published patents relating to that invention, also known as “equivalents”. English language summaries for the patent family along with the original data for each family member are provided:
- Patent family, or invention level, data: Derwent written titles and abstracts written to summarize the novelty, use and advantage of an invention, proprietary Derwent Classes and Derwent Manual Codes, subject indexing and in-depth chemical and polymer indexing, electrical and engineering drawings dating back to 1988, and chemical structure drawings dating back to 1992. Bibliographic information including patent assignees, inventors, classification codes and priority application numbers from the individual patents, which is collated and de-duplicated.
- Original publication, or as-published, data: full author name and address, document title, abstract, claims, patent classification codes, filing details, and legal representative. The amount of original publication data present in each record varies by publishing authority, patent kind, and time, as indicated in the Sources section.
Starting in 1999, additional abstracts and indexing features are provided. The Derwent written abstract is organized into paragraphs with informative, searchable paragraph headings. This abstract also contains a Novelty paragraph describing the non-obvious improvements over previous technology. A Technology Focus section contains separate paragraphs providing different technological viewpoints of the invention. The Extension Abstract and Documentation provide detailed summaries that bridge the gap between the concise abstract summary and the full text patent document.
Also see the ProSheets for Derwent Chemistry Resource (DCR), which provides chemical searching with a link back to the DWPI records that include the chemical; and Patents Citation Index (PCI), which details examiner and author citations for patents from 25 patent-issuing authorities.
More information on Derwent World Patents Index is available here.
Lexis-Nexis Univentio (LNU) provides access to the complete text of patents issued by 33 countries and patenting authorities around the world, and the bibliographic data of 72 additional patenting authorities. The patents are organized in separate databases by country/authority, such as Denmark Patents Fulltext and WIPO PCT Patents Fulltext.
Derwent Patents Citation Index (DPCI), produced by Clarivate Analytics, provides access to more than 98 million patent and 11 million literature citations found in more than 11 million patent families. In each update, examiner citations from about 50,000 documents from major patent-issuing authorities are added. Each record in the database describes a patent family for a single invention.
Derwent Chemistry Resource (DCR) offers structure searching and various other substance identification and indexing data of the chemical structures indexed from update 199916 forward within Derwent World Patents Index® (DWPISM) and the Derwent Drug File (DDF).