4. Miscellaneous active electrical nonlinear devices, circuits, and
  5. Specific signal discriminating without subsequent control
  6. By phase

Akio Fujikawa

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D/A converter circuit, organic EL drive circuit, and organic...

Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Reexamination Certificate

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Disk recording apparatus with erroneous writing protection

Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Reexamination Certificate

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Frequency and phase comparator

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By phase
Patent

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Information recording apparatus

Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Reexamination Certificate

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Information recording apparatus

Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1639464

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