DWPITM Manual Codes is a hierarchical indexing system, intended for use as a patent retrieval and analysis tool. The DWPI Manual Codes index the inventive and significant aspects of an invention, plus its commercial applications.
The DWPI Manual Codes are consistently applied by specialist teams at Clarivate, meaning that they can significantly improve the accuracy of searches compared to using word-based searching, and help to ensure that time is not wasted viewing irrelevant search results. Also, the need to search all possible synonyms and spellings of the topic of interest is avoided by the use of a coding system.
The DWPI Manual Code system is divided into technology Sections by letter in the same way as DWPI Classification. There are more than 27,000 DWPI Manual codes in total, divided broadly as follows:
Sections A-N Chemical Patents Index (CPI), >8,000 codes
Sections P&Q General & Mechanical Patents Index, (GMPI), >3,000 codes
Sections S-X Electrical Patents Index (EPI), >15,000 codes
For more details, see the User Manuals below, or use the Manual Code Lookup tool at the foot of this page
Engineering User Guide (EPI and GMPI)
Manual Code Revision
The DWPI Manual Code hierarchies are revised annually in January to accommodate changes in technology, and provide finer subject matter breakdown.
The revisions for 2023 are shown in the below document.
Submit Your Suggestions
If you would like to submit a suggestion for possible inclusion in the next DWPI Manual Code Revision, please contact us via email at: firstname.lastname@example.org