Using the International Patent Classification in an online environment ?
This paper considers the background history, development and modern use of the IPC as a storage and retrieval tool. Although originally designed as a shelf-location tool for paper search-files, the classification has certain features which make it an attractive option for subject-based patent searching of electronic databases. The online load of the IPC by the major host systems is considered, together with a discussion of how to enhance search results by using the classification.
international patent classification patent searching online databases precedence rules revision practice concordances hierarchical structure dot-level notation search term truncation last place rule scope notes hybrid systems user aids