US PATENT SUBCLASS 348 / 5.5
USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH)
Current as of:
June, 1999
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348 /
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TELEVISION
5.5
USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH)
DEFINITION
Classification: 348/5.5
USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH):
(under the class definition) Subject matter which blocks access of a video signal source or otherwise limits usage of a television device.
SEE OR SEARCH CLASS
194, Check-Actuated Control Mechanisms, appropriate subclasses for coin controlled device of general utility.
360, Dynamic Magnetic Information Storage or Retrieval,
60, for preventing recording or erasing an earlier recording on a record carrier.
379, Telephonic Communications,
143+, for telephone paystation check operated control, and subclasses 188+ for call or terminal access alarm or control. 380, Cryptography,
7, and subclasses 10+ for concealing intelligible information in a video signal.
455, Telecommunications,
26.1, for use or access blocking of a modulated carrier wave communication in general and subclass 411 for radiotelephone with privacy or lockout.
