Data exchange system

Communications: electrical – Continuously variable indicating – With meter reading

Patent

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Details

34082531, 34082572, 455343, G08C 1900

Patent

active

055193862

ABSTRACT:
A data exchange system is provided including a fixed station and portable data carrier for transmitting energy between the station and carrier. Both the fixed station and the portable data carrier operate in the active mode and the passive mode. The data carrier operates in an active mode only when energy transfer is required.

REFERENCES:
patent: 4688036 (1987-08-01), Hirano
patent: 4835531 (1989-05-01), Sato
patent: 5317309 (1994-05-01), Vercellotti et al.

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