Usefulness of the hybrid systems in computerized searches

Masatoshi Nishikawa

World Patent Information, 1990, vol. 12, issue 4, 212-215

Abstract: The development of hybrid classification systems associated with the IPC in the Japanese Patent Office is described and the effectiveness of search in a computerized system based on the IPC hybrid system in the lubrication field (subclasses C10M, C10N) is examined.

Date: 1990
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