4. Metal working
  5. Method of mechanical manufacture
  6. Electrical device making

Charles H. Berry, III

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Dial-type flow-restriction gauges

Measuring and testing – Fluid pressure gauge
Reexamination Certificate

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Method for manufacturing a commutator

Metal working – Method of mechanical manufacture – Electrical device making
Patent

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Non-locking switch for filter monitoring

Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1821328

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