The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 1990
Filed:
Nov. 18, 1987
Applicant:
Inventors:
Tetsuya Masuishi, Machida, JP;
Hiroshi Tsuji, Kawasaki, JP;
Chizuko Yasunobu, Yokohama, JP;
Hideo Ohata, Machida, JP;
Assignee:
Hitachi Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364513 ; 364300 ;
Abstract
In a production system having a memory for storing a group of rules each comprising a condition part and a conclusion part, inference means for inferring by using the group of rules and a working memory, whether a condition part is true or false in the working memory is determined, and if it cannot be determined, a rule having a conclusion part as to whether the fact is true or false is searched, and the conclusion part of the searched rule is used for backward reasoning. If the rule is not found by the search, an inquiry is made to a user.