4. Electricity: measuring and testing
  5. Conductor identification or location
  6. Inaccessible

Dieter Drefahl

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Apparatus for evaluating the distance of an object

Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent

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Method for operating a transmitting/receiving circuit and a circ

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent

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Method for operating a transmitting/receiving circuit and an app

Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent

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System for transmitting and receiving a periodic pulse train

Communications – electrical: acoustic wave systems and devices – Echo systems
Patent

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Profile ID: LFUS-PAI-P-693562

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