4. Telephonic communications
  5. Reception of calling information at substation in wireline...
  6. Blocking caller id transmission

Zhi-Cheng Sun

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Telephone with novel FSK decoding means, simultaneous off-hook c

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent

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Telephone with novel FSK decoding means, simultaneous...

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Reexamination Certificate

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