With the letter came a series of illustrations of how one Codegent app - which teaches you Chinese - had made use of this patented technology.

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This patented technology ensures that only real fingerprints are read by converting the properties of the skin into digital data which are delivered to the host computer for analysis.

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The real issue of interest is the FAT stack: and the others, like Samsung etc are all quite happily (well, OK, maybe through gritted teeth) paying Microsoft for this and other bits and pieces of patented technology.

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