4. Electrical generator or motor structure
  5. Non-dynamoelectric
  6. Piezoelectric elements and devices

Allan J. Roberts

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Electroacoustic converter

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric
Reexamination Certificate

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Ultrasonic apparatus

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent

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Ultrasonic apparatus

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent

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Ultrasonic power supply

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent

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Profile ID: LFUS-PAI-P-1186861

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