| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency and precision of analyzing operation by repeating operation for extracting a secondary quoted document for a primary quoted document after extracting the primary quoted document for information under specific conditions, and generating a specific list according to those quoted documents. SOLUTION: When a personal computer is powered on, a program starts (S101) to display a menu picture on a CRT (S102). When quoted document retrieval is selected, a condition setting picture appears and various conditions for quoted document retrieval are inputted and set (S103). Then all quoted documents up to an (n)th-order quoted document which is inputted and set are extracted from many patent information groups in, for example, a CD-ROM patent official report (S104). Then it is judged that all the documents need to be listed (S105) and when so, a list of all the extracted quoted documents is generated (S106), outputted (S107), and displayed on the CRT.
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