4. Telecommunications
  5. Radiotelephone system
  6. Usage measurement

David Roat

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Method and apparatus for generating billing data in a...

Telecommunications – Radiotelephone system – Usage measurement
Reexamination Certificate

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Method and apparatus for generating billing data in a...

Telecommunications – Radiotelephone system – Usage measurement
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2011921

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