Object identification system

Details Object identification system Object identification system

1996-04-17

1998-10-20

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

455 311, 340572, H04Q 522, H04Q 700, G08B 1314

Patent

active

058252991

ABSTRACT:
An object identification system comprises a transceiver (1) and a transponder (30) including memories (33,34) for storing an identification code identifying the transponder. Circuits (35, 36, 37, 38) generate an identification signal representative of the identification code such that the identification signal is modulated by bits of the identification code. Circuits (8, 9, 10, 11, 12) of the transceiver receive and interpret the identification signal. The transponder includes a variable code generator (32) and a controller (31) for controlling the writing of the variable code into memory (33) so that the variable code constitutes part of the identification code. The variable code may be a random or pseudo-random code.

REFERENCES:
patent: 3670303 (1972-06-01), Dame
patent: 3755811 (1973-08-01), Breckman
patent: 3859634 (1975-01-01), Perron et al.
patent: 3914762 (1975-10-01), Klench
patent: 4931788 (1990-06-01), Creswick
patent: 5361062 (1994-11-01), Weiss et al.
patent: 5519729 (1996-05-01), Jurisch et al.
patent: 5525991 (1996-06-01), Nagura et al.
patent: 5537105 (1996-07-01), Marsh et al.

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