US2003141954A1
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Inductive device
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US2002186110A1
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Magnetic transducers of improved resistance to arbitrary mechanical shock
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US6526153B2
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Armature assembly for balanced moving armature magnetic transducer and method of locating and adjusting same
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US6023194A
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Amplifier with reduced input capacitance
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US6031922A
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Microphone systems of reduced in situ acceleration sensitivity
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US5589799A
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Low noise amplifier for microphone
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US5570428A
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Transducer assembly
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US5299176A
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Balanced armature transducers with transverse gap
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US5220612A
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Non-occludable transducers for in-the-ear applications
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US4518831A
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Transducer with translationally adjustable armature
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US4442324A
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Encapsulated backplate for electret transducers
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US4430520A
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Transducer shielding enclosure
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US4410769A
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Transducer with adjustable armature yoke and method of adjustment
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US4418246A
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Cell assembly for electret transducer
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US4056742A
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Transducer having piezoelectric film arranged with alternating curvatures
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CA941953A
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Transducers having piezoelectric struts
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US3671684A
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Magnetic transducer
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US3617653A
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Magnetic reed type acoustic transducer with improved armature
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US3531745A
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Magnetic translating device with armature flux adjustment means
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DE1762263A1
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Magnetic converter
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