US PATENT SUBCLASS 380 / 22-- .~ With magnetic record carrier (e.g., tape, drum)

US PATENT SUBCLASS 380 / 22
.~ With magnetic record carrier (e.g., tape, drum)

Current as of: June, 1999
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380 /	HD	CRYPTOGRAPHY

9	DF	ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
22		.~ With magnetic record carrier (e.g., tape, drum)

DEFINITION

Classification: 380/22

With magnetic record carrier (e.g., tape, drum):

(under subclass 9) Subject matter utilizing storage on or retrieval from a moving magnetic element for encoding the signal.

(1) Note. The moving element is often an elongate web.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3+, for encryption of recorded data.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval,

7, and 8+ for delay, and for modification, respectively, of an electrical signal by recording and subsequent retrieval from a magnetic record medium.