US PATENT SUBCLASS 348 / 1
USE SURVEY AND ACCOUNTING

Current as of: June, 1999
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348 /   HD   TELEVISION

1USE SURVEY AND ACCOUNTING {4}
2  DF  .~> Monitoring of physical reaction of viewer
3  DF  .~> With billing
4  DF  .~> Monitoring of synchronization or blanking pulse (e.g., horizontal or vertical pulse signal)
5  DF  .~> With video cassette recorder (VCR)

DEFINITION

Classification: 348/1

USE SURVEY AND ACCOUNTING:

(under the class definition) Subject matter including means for indicating, metering, or recording the number of receivers using a particular television presentation, the length of time that a presentation is being received, or which of concurrent presentations is being received.

SEE OR SEARCH CLASS

380, Cryptography, appropriate subclasses for cryptos:graphic prevention of unauthorized signal use.

455, Telecommunications,

2+, for modulated carrier wave systems with monitoring or survey means.