Derwent Advanced Search Field Tags

Field Tag	Description
AN=Assignee Name	Searches for assignee names in the Assignee(s) field within a patent record.
AC=Assignee Code	Searches the Code(s) field within a patent record.
AE=Assignee Name + Code	Searches the Patent Assignee Name(s) and Code(s) field within a patent record.
AU=Inventor	Searches for names in the Inventor Name(s) field within a patent record.
CAC=Cited Assignee	Searches the Patent Assignee Name(s) and Code(s) field within a cited patent record.
CPC=Cited Assignee Code	Searches the Code(s) field within a cited patent record.
CD=Cited PAN	Searches the Derwent Primary Accession Number field within a cited patent record.
CAU=Cited Inventor	Searches for names in the Inventor Name(s) field within a cited patent record.
CN=Cited Assignee Name	Searches the Patent Assignee Name(s) field within a cited patent record.
CP=Cited Patent Number	Searches the Patent Number(s) field within a cited patent record.
CX=CP + Family	Searches the Patent Number(s) field within a cited patent family. A patent family is a set of individual patents granted by various countries. Think of a patent family as all the equivalent patent applications corresponding to a single invention, covering different geographical regions.
DCN=Derwent Compound Number	Searches the Derwent Compound Number field within a patent record.
DC=Class Code	Searches the Derwent Class field within a patent record.
DCR=DCR Number	Searches the Derwent Chemistry Resource Number field within a patent record.
DRN=Derwent Registry Number	Searches the Derwent Registry Number field within a patent record.
PAN=Derwent Prim. Access. No.	Searches the Derwent Primary Accession Number field within a patent record. For example, GA=1999-527918 finds this patent record.
IP=IPC	Searches the International Patent Classification (IPC) field within a patent record.
MAN=Derwent Manual Code	Searches the Derwent Manual Code(s) field within a patent record.
PN=Patent Number	Searches the Patent Number(s) field within a patent record.
RIN=Ring Index Number	Searches the Ring Index field within a patent record.
TI=Title	Searches the Title field within a patent record.
TS=Topic	Searches for topic terms in the Title and Abstract fields within a patent record.