Effective strategies for searching existing patent rights

J. van der Drift

World Patent Information, 1991, vol. 13, issue 2, 67-71

Abstract: The article describes ways of increasing the cost- effectiveness of online searching. Information from previous searches is stored and up-dated as searches are repeated. Recall is improved by broadening the search, e.g. by adding broader indexing terms, multiple file searching and citation searching, and then precision is improved, particularly in infringement searching, by imposing limitations such as 'and' and 'and not' operators. For example, false drops found in previous searches, expired patents, and 'not in force patents' obtained from legal status databases are eliminated and the search limited to specific countries.

Date: 1991
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