4. Communications: electrical
  5. Audible indication
  6. Ultrasonic pest control

Martin Siegwarth

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Electronic signal generator with periodically varying frequency

Communications: electrical – Audible indication – Ultrasonic pest control
Patent

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Process and circuit for connecting an actuator to a line

Communications: electrical – Systems – Selsyn type
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1610687

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