Method of electromagnetically reading coordinate data

Telegraphy – Systems – Position coordinate determination for writing

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G08C 2100

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active

045544093

ABSTRACT:
In an electromagnetic type digitizer system having a cursor coil and a tablet, the cursor position can be determined accurately by much a simplified method which basically uses a distribution curve of electromotive force induced by the cursor coil in the tablet.

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patent: 4418242 (1983-11-01), Kouno

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