Retrieval apparatus using logical operators

Details Retrieval apparatus using logical operators Retrieval apparatus using logical operators

1987-07-31

1990-05-08

Smith, Jerry

Communications: electrical

Continuously variable indicating

With meter reading

364419, G08B 522

Patent

active

049242199

ABSTRACT:
A retrieval apparatus of this invention includes retrieval processing sections constituted by semiconductor IC elements attached to each of the objects to be retrieved, and an operation section for supplying a retrieval condition to these retrieval processing sections. In each retrieval processing section, retrieval item information of an object to be retrieved to which the individual section is attached is stored in a storage section, a retrieval condition signaled from the operation section is received and analyzed, the analysis result is collated with the information stored in the storage section, and if a coincidence is detected, signaling is performed by light or sound. The retrieval condition may be constituted using logical product, logical sum and logical negation operators.

REFERENCES:
patent: 4476469 (1984-10-01), Lander
patent: 4595922 (1986-06-01), Cobb et al.
patent: 4636950 (1987-01-01), Caswell et al.
patent: 4656463 (1987-04-01), Anders et al.
patent: 4688026 (1987-08-01), Scribner et al.
Lexis Handbook, Media Data Central, Copyright 1980.
APS Text Search and Retrieval Reference Manual, Command Summary, Sept., 1986.

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