4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Video

Seong-Han Kim

Inventor

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Call charge transferring method in PBX system

Telephonic communications – With usage measurement – Call charge metering or monitoring
Reexamination Certificate

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Reel-down for a video cassette

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Video
Patent

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Profile ID: LFUS-PAI-P-800822

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