4. Telephonic communications
  5. With usage measurement
  6. Call charge metering or monitoring

Arpad Hegedus

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Circuit arrangement for record players performing the setting ba

Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent

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Telephone exchange with a further unit

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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Profile ID: LFUS-PAI-P-982146

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