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

John Ernest Harden, Jr.

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Electro-mechanical energy conversion devices and systems

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate

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Method of creating an electro-mechanical energy conversion...

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Profile ID: LFUS-PAI-P-3256589

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