Stanford University Libraries

Patent Database Searching Aids and Techniques

Patent Search Aids

For U.S. Patents

U.S. Patent Classifications
http://patents.uspto.gov/CLASSES/classes.html
Browse the U.S. Patent Classifications.
U.S. Manual of Classification
http://patents.uspto.gov/CLASSES/classes.html
Search the U.S. Manual of Classification.
U.S. Patent Classifications with Definitions
http://patents.cnidr.org/pto/classes.html
CNIDR is constructing a series of hyperlinked Patent Classifications pages as part of the Patents Project. This page provides direct links into the individual U.S. Classification Schedule pages and the U.S. Class Definitions.

For Foreign Patents

Inter Active Terminology for Europe
http://iate.europa.eu/iatediff/
Created by the European Union, translates between 10 European Languages (Danish, Dutch, English, French, German, Italian,Portuguese, Spanish, Swedish, and Finish). [formerly Eurodic Autom]
Introductory Manual to the International Patent Classification (IPC)
http://www.wipo.org/eng/general/ipc/manual/index.htm
International Patent Classification in 5 Languages
http://www.dagostini.it/patclass/patclass
5-Language (English, German, French, Spanish, Italian) Interactive Patent Terminology & Classification by Giovanni D'Agostini
Country Codes — WIP0 Standard ST. 3
http://www.wipo.org/eng/general/pcipi/standard/st3.htm
Patent Kind Codes
http://www.questel.orbit.com/patents/kind.html
This list from Questel identifies the various stages, by each country, that a patent application moves through during its life cycle.

For Chemical Abstracts

Patent Coverage in Chemical Abstracts
http://www.cas.org/EO/caspat.html
International Patent Classifications Lists for items in CA
Guaranteed Coverage
http://www.cas.org/EO/ipcguar.html
Partial Coverage
http://www.cas.org/EO/part.html
Kind Codes for Patents in Chemical Abstracts Online
http://www.cas.org/EO/patkind.html

Patent Search Techniques

Patent Searching Research Archives
http://www.fplc.edu/ipmall/psra.htm
Part of the Franklin Pierce Law Center Intellectual Property Mall, contains a collection of articles and web resources devoted to the study of patent searching.
PIUG/PATMG Patent Information Discussion Listserv
http://www.piug.org/list.html
Patent Information User Group/Patent and Trade Mark Group: two organizations whose members include professional patent searchers.
Guide to STN Patent Databases
http://www.fiz-karlsruhe.de/stn/documentation/patents/index.html
Includes descriptions of all patent databases available through STN. Also includes main search strategies used to search patent files.
Dialog's Search Solutions
http://training.dialog.com/quick/solutions/
Includes search strategies for searching intellectual property files.
Derwent Chemical Indexing ListServer (CHEMIND-L)
http://www.derwent.co.uk/resource/chemind.html
Discussion forum for questions relating to indexing and searching chemical structure information.
CHEMIND-L Archive:
http://www.derwent.co.uk/archive/chemind/index.html