4. Electrical audio signal processing systems and devices
  5. Monitoring/measuring of audio devices
  6. Loudspeaker operation

J. David Pfeiffer

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Battery charger housing

Equipment for production – distribution – or transformation of ene – Casing or enclosure not elsewhere specified
Design Patent

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Battery size detector for a battery charger

Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Reexamination Certificate

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Speech synthesizer

Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Patent

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Profile ID: LFUS-PAI-P-1371923

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