4. Data processing: measuring, calibrating, or testing
  5. Measurement system
  6. History logging or time stamping

Jack C. Crystal

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Determining location of an audience member having a portable...

Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
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Gathering data concerning publication usage

Communications: electrical – Condition responsive indicating system – Specific condition
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Gathering data concerning publication usage

Measuring and testing – Testing of apparatus
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Gathering data concerning publication usage

Data processing: measuring – calibrating – or testing – Measurement system – History logging or time stamping
Reexamination Certificate

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Gathering data concerning publication usage

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2335828

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