Document (#13133)

Author
Nishikawa, M.
Title
Usefulness of hybrid systems in computerised searches
Source
World patent information. 12(1990), no.4, S.212-215
Year
1990
Abstract
Describes the development of hybrid classification systems associated with the International Patent Classification (IPC) in the Japanese Patent Office and examines the effectiveness of search in a computerised system based on the IPC hybrid system in the lubrication field (subclasses C10M, C10N)
Object
IPC

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