Christopher G. Harris, Robert Arens, Padmini Srinivasan. Using Classification Code Hierarchies for Patent Prior Art Searches. In Mihai Lupu, Katja Mayer, John Tait, Anthony J. Trippe, editors, Current Challenges in Patent Information Retrieval. Volume 29 of The Information Retrieval Series, pages 287-304, Springer, 2011. [doi]
Abstract is missing.