Inquiry system for detecting a selected object

Communications: electrical – Continuously variable indicating – With meter reading

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Details

340825720, 340825350, 340825490, 455607, H04Q 700, H04B 900

Patent

active

048147427

ABSTRACT:
An inquiry system is provided for detecting the location of a selected object. The system comprises an answering device having its own identifying address which responds to a detecting command. An answering device is provided on each object to be selected. The detecting command is transmitted from a controller device which communicates with the answering devices through the use of an address.

REFERENCES:
patent: 4194201 (1980-03-01), Stein
patent: 4376936 (1983-03-01), Kott
patent: 4635053 (1987-01-01), Banks et al.
patent: 4636950 (1987-01-01), Caswell et al.
patent: 4649385 (1987-03-01), Aires et al.
patent: 4656463 (1987-04-01), Anders et al.
patent: 4661806 (1987-04-01), Peters et al.

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