4. Telecommunications
  5. Radiotelephone system
  6. Usage measurement

David Barrington Everett

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Electronic toll payment

Telecommunications – Radiotelephone system – Usage measurement
Patent

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IC card transportation key set

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate

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Integrated circuit card with application history list

Registers – Records – Conductive
Reexamination Certificate

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Key transformation unit for a tamper resistant module

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate

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Key transformation unit for a tamper resistant module

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1060732

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