Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04N
PICTORIAL COMMUNICATION, e.g. TELEVISION
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1/00
Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
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H04N1/448
Rendering the image unintelligible, e.g. scrambling
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H04N1/4486
using digital data encryption
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