4. Electricity: measuring and testing
  5. Testing and calibrating electric meters

Roger A. Brown

Inventor

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Ball valve extractor

Fluid handling – With repair – tapping – assembly – or disassembly means – Tool for applying or removing valve or valve member
Reexamination Certificate

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Chromatograph

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Chemical
Patent

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Cutter element

Cutting – Tool or tool with support – Wire tool
Patent

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Electronic constant current and current pulse signal generator f

Electricity: measuring and testing – Testing and calibrating electric meters
Patent

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Iron complex synthesis

Chemistry: fertilizers – Processes and products – Inorganic material
Patent

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Profile ID: LFUS-PAI-P-58570

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