US PATENT SUBCLASS 455 / 26.1
USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

26.1USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH)

DEFINITION

Classification: 455/26.1

USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH):

(under the class definition) Subject matter which blocks access to a signal source or otherwise limits usage of modulated carrier equipment.

SEE OR SEARCH CLASS

194, Check-Actuated Control Mechanisms, appropriate subclasses for a coin controlled device of general utility.

380, Cryptography,

6+, and 9+ for encryption by signal masking and scrambling, respectively.