Inventory management system

Details Inventory management system Inventory management system

1993-04-13

1995-04-11

Hajec, Donald

Communications: radio wave antennas

Antennas

High frequency type loops

343866, 455 78, 327493, H01Q 1112, G06F 1524

Patent

active

054062977

ABSTRACT:
An inventory management system which includes a transponder, an interrogation transceiver and control devices utilized therewith. The control devices operate to minimize the power consumption of the transponder while permitting selected, coded operation of the inventory management system. The interrogation transceiver provides linkage to the transponder by means of a modulated radio frequency (RF) carrier during system operation. A transmit/receive switch is also included in the invention to prevent harmful coupling between the transponder receiver and the transponder transmitter. This could occur during data exchanges between the transponder and the interrogation receiver.

REFERENCES:
patent: 3671970 (1972-06-01), Layton
patent: 3694754 (1972-09-01), Baltzer
patent: 4339827 (1982-07-01), Torres et al.
patent: 4380011 (1983-04-01), Torres et al.
patent: 4637065 (1987-01-01), Ruppel
patent: 4979232 (1990-12-01), Martz et al.
patent: 5054114 (1991-10-01), Erickson

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