4. Electrical computers and digital processing systems: support
  5. Multiple computer communication using cryptography
  6. Particular communication authentication technique

Chien-Fa Yeh

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System and method for digitally signing electronic documents

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

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System and method for downloading text content and images in...

Data processing: database and file management or data structures – Database and file access – Record – file – and data search and comparisons
Reexamination Certificate

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System and method for searching information and displaying...

Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2165744

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