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Home › System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS)

System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS)

US Patent 6226529 · Granted May 1, 2001

Estimated economic value: $10,595,000 ⓘ

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