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May 2018

STN(R) Reflects Second Update to Emtree(R) Thesaurus for 2018

April 2018

CCI Now Searchable in CAS REGISTRY(SM)

February 2018

Chinese dual filings are now linked within DWPI families

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DWPI: US National Patent Classification thesaurus added

22. March 2010

US National Patent Classifications are being added to the DWPI database (files WPINDEX/WPIDS/WPIX) for some time already. Now a thesaurus is being made available to make navigating through the maze of codes easier. For available relationships see HELp RCO.

For further particulars please refer to our Help Desk.