考慮專利分類號之相關性於建立專利文件相似性之研究

Building Patent Document Similarity by Considering the Dependency of Patent Classification Codes

蒲開瑜(Kai-Yu Pu)

指導教授 ： 陳達仁

國立臺灣大學/工學院/機械工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.01166

摘要

本研究以專利分類號作為特徵並考慮其相關性來計算專利文件的相似度。專利分類號是被專利審查者所賦予，又因為每篇專利被賦予數個專利分類號，意味著這些專利分類號之間有相關性；而每個專利分類號都有它們所屬的一種階層式的分類號表。因此在計算專利文件的相似性時，兩個相關性因子被考慮：專利分類號對被賦予在同一篇專利文件上，稱之為專利分類號的共現(co-occurrence)關係；另一個則是專利分類號所屬的專利分類表中的階層性關係，稱之為專利分類號的階層性關係(hierarchical relation)。然而，並非所有的共現都是有效的，本研究定義出一個有效的門檻過濾掉無效的共現關係。藉由有效的共現關係以及階層性關係來代表專利分類號之間的相關性，並且利用UCINET將所選擇的專利群之專利分類號視覺化做呈現。
本論文以機械手技術相關(Dexterous Hand of Robot)作為衡量研究方法可行性的研究個案，研究結果顯示，確實能夠經由美國專利分類號之間的共現關係以及階層性關係計算出更佳的專利相似度。

關鍵字

專利文件相似度 ； 美國現行專利分類號 ； 特徵相關性 ； 階層性關係 ； 共現關係

並列摘要

A methodology using patent classification codes as feature to calculate the patent document similarity which considered the feature dependency is presented in this study. The patent classification codes which is assigned by patent examiner as selected feature. Because each patent has several patent classification codes means they have feature dependency, and patent classification codes have their class schedule which is a hierarchical schedule. Two dependency factors will be introduced when we calculating the similarities of patent documents: One is the co-occurrence of classification codes which is the patent classification codes pair co-assigned in the same patent called co-occurrence; and another one is the hierarchical relation in patent classification codes schedule where each classification codes belong to is called hierarchical relation. However, some patent classification codes are infrequent so the co-occurrences are not all validity, so this study defines a threshold to filter the invalidity co-occurrences. The validity co-occurrences and hierarchical relations to show the dependencies of patent classification codes which belong to the selected patent data set are visualize by UCINET. Illustration of the systematic methodology is successfully demonstrated by using United State patent classification which is considered the hierarchical relation and co-occurrence as selected feature in some case studies.

並列關鍵字

Patent documents similarity ； current USPC ； Feature dependency ； Hierarchical relation ； Co-occurrence

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