Extended range highly selective low power consuming data tag and

Details Extended range highly selective low power consuming data tag and Extended range highly selective low power consuming data tag and

1997-07-28

1998-10-20

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250234, 235380, 235472, G06K 710

Patent

active

058250450

ABSTRACT:
An information transducing system including a data tag for digitally storing data and a tag reader for selectively activating data tags such that a terminal may at least receive the digitally stored data in a selected data tag for storage and/or transmission of the digitally stored data in the data tag. The tag reader may be operated so as to transmit a unidirectional beam of radiant energy such that it impinges on a data tag to be read. The radiant energy radiating from the tag reader activates the data tag causing the data tag to transmit its digitally stored data via radiant energy to the tag reader and/or a terminal operably coupled to the tag reader.

REFERENCES:
patent: 4242663 (1980-12-01), Slobodin
patent: 4658147 (1987-04-01), Eldering
patent: 5280159 (1994-01-01), Schultz et al.
patent: 5382784 (1995-01-01), Eberhardt

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