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

Ming T. Lien

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Arithmetic training apparatus

Patent

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Display of mathematical equations

Communications: electrical – Systems – With specific power supply
Patent

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Housing for computer data storage drive

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

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Machine for teaching reading

Education and demonstration – Language – Spelling – phonics – word recognition – or sentence formation
Patent

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Machine for teaching reading

Patent

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Profile ID: LFUS-PAI-P-723329

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