4. Metal working
  5. Method of mechanical manufacture
  6. Assembling or joining

Axel Stoffel

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Apparatus and method for selective electrochemical etching

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent

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Electrostatic electroacoustical transducer

Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Physical deformation
Reexamination Certificate

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Method for making an improved polysilicon conductor structure ut

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Slot microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1297737

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