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

Douglas Lau

Inventor

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Method and apparatus for tracking location of wireless terminals

Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent

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Pay telephone

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

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Wireless frequency-division-multiple-access direct sequence spre

Pulse or digital communications – Repeaters – Testing
Patent

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Profile ID: LFUS-PAI-P-1120550

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