4. Communications: electrical
  5. Selective
  6. Intelligence comparison for controlling

Jürgen Krühn

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Key and lock device

Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate

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Key and lock device

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

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Key and lock device

Communications: electrical – Selective – Intelligence comparison for controlling
Reexamination Certificate

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Lock-key system

Locks – Operating mechanism – Key
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2761411

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