Joseph A. Sawyer

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Armature assembly for balanced moving armature magnetic...

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

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Armature assembly for balanced moving armature magnetic...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate

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Cell assembly for electret transducer

Patent

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Encapsulated backplate for electret transducers

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Magnetic transducers of improved resistance to arbitrary...

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-835254

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