US Patent 6,757,828 June 29, 2004
Indigenous Authentication for sensor-recorders
and other information capture devices.
6757828-signa2.pdf
Full document 33 pages 1.5 MB PDF
6757828-pg1.pdf
First page only 45 KB PDF
Signa2-Brief-v2b.pdf
Briefing document 13 pages 346 KB PDF
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