4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Microphone capsule only

Eun S. Kim

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IC processed piezoelectric microphone

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering
Patent

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IC processed piezoelectric microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Patent

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Portable range extender operable in automatic and manual modes

Electricity: motive power systems – Battery-fed motor systems
Reexamination Certificate

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Profile ID: LFUS-PAI-P-695930

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