4. Refrigeration
  5. Automatic control
  6. Refrigeration producer

David C. Macke, Sr.

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Oil level control system

Refrigeration – Automatic control – Refrigeration producer
Patent

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Proximity detector

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Design Patent

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Proximity detector for hard-to-detect materials

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis
Reexamination Certificate

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Three wire interface for field wiring of on/off sensors

Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Instruments and devices for fault testing
Reexamination Certificate

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Time-domain reflectometry user input device

Electricity: measuring and testing – Determining nonelectric properties by measuring electric...
Patent

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Profile ID: LFUS-PAI-P-345022

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