Report:DialogClassic and Classic Web/Data Coverage/Summary
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Full and Partial Text Collections
The following coverage dates were obtained from the system's user guide materials and represent the reported start dates for each collection. Please note that gaps in coverage may exist in any collection due to a number of factors, such as missing documents, scanning errors, OCR errors, even failure of national and regional patent offices to report data. No data source can be considered 100% complete, and searchers should consult as many unique data sources as possible.
Citations: US from 1971; EP and WO from inception
Derwent Patents Citation Index Coverage: United States (US) citations: 1973+; European Patent Office (EP), Patent Cooperation Treaty(WO/PCT) citations: 1978+; United Kingdom (GB), Germany (DE), Japan (JP) citations: May 1994+; Belgium (BE), France (FR), Netherlands (NL) citations: May 1994-May 1997, March 2007+; Spain (ES) citations: March 2007+
Legal Status: INPADOC Family and Legal Status (File 345): 1850 to the present; IFI CLAIMS Legal Status (File 123) (for US patents only).
Family Data: INPADOC Family and Legal Status (File 345): 1850 to the present; Derwent World Patent Index (File 350/351/352) family data.
Document Images: Front-page images available through indirect ordering using the "Order Documents" function. Some representative patent drawings available through the Derwent World Patents Index (File 350/351/352), and from other patent files where available. See individual file bluesheets for more information.
Dialog Classic and Classic Web access the entire Dialog collection of databases. Included in this collection are approximately 18 patent or patent-related files including full-text files for patent documents from the United States (US), European Patent Office (EPO), World Intellectual Property Organization (WIPO/PCT), France (FR), Germany (DE), as well as Chinese patent abstracts in English.
The databases available through Dialog seem to have the major international authorities covered, while leaving out “smaller” players such as Australia, New Zealand, India, etc.