4. Optical communications
  5. Fault recovery
  6. Bypass inoperative element

Hak-Phil Lee

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Bidirectional WDM self-healing ring network

Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate

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Gain-flattened wideband erbium-doped optical fiber amplifier

Optical: systems and elements – Optical amplifier – Beam combination or separation
Reexamination Certificate

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Gigabit Ethernet-based passive optical network and data...

Cryptography – Communication system using cryptography – Fiber optic network
Reexamination Certificate

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Passive optical network employing multi-carrier code...

Optical communications – Multiplex – Code division multiplexing
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2979257

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