US PATENT SUBCLASS 380 / 51-- .~ With production of printed copy (e.g., printer, typewriter)

US PATENT SUBCLASS 380 / 51
.~ With production of printed copy (e.g., printer, typewriter)

Current as of: June, 1999
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380 /	HD	CRYPTOGRAPHY

9	DF	ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
51		.~ With production of printed copy (e.g., printer, typewriter)

DEFINITION

Classification: 380/51

With production of printed copy (e.g., printer, typewriter):

(under subclass 9) Subject matter which generates a permanent visible record of either the encrypted or decrypted characters.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18, for reproduction of an optically scanned document image in cryptos:graphic equipment.

52, for an electrical cryptos:graphic device controlled by a keyboard not limited to a typewriter.

55, for an electrical cryptos:graphic device controlled by a keyboard not limited to a typewriter.

SEE OR SEARCH CLASS

400, Typewriting Machines,

90, for a typewriter having electrical key reassignment without message concealment (e.g., "QWERTY" to "DVORAK" conversion).