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Citations are provided for EP and WO, and for all searches made at the EPO (for BE, CH, EP, FR, GB, NL, TR), as well as for US from 1948 and DE from 1965. 

Note

Note:  DOCDB data for EP and WO associates citations with the first publication only, regardless of the stage at which the citation was made. For Euro-PCTs, all citations from the international search report are presented in the first publication of the WO record (and are not repeated in the EP A-level record).

Element

Description

source name

Indicates when or by whom the citation was made. 
Codes used for source of citation: 
CH2=Chapter 2, SUP=Supplementary search report, ISR=International search report, SEA=Search report, APP=Applicant, EXA=Examiner, OPP=Opposition, TPO=Third party observation, PRS=Pre-grant pre-search, APL=Appeal, FOP=Filed for opposition

source category

Only EP and WO. The category indicates the relevance of the citation. Values include the following:
A=technological background, D=document cited in application, E=earlier patent document, 1=document cited for other reasons, O=non-written disclosure, P=intermediate document, T=theory or principle, X=relevant if taken alone, Y=relevant if combined with other documents.

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