4. Electricity: electrical systems and devices
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Joseph T. Downey

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Accessory connector

Geometrical instruments
Patent

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Adaptive impedance mismatch detector system

Amplifiers – With semiconductor amplifying device – Including protection means
Patent

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Adaptive quadrature combining apparatus

Amplifiers – Hum or noise or distortion bucking introduced into signal...
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Adjustable active filter

Amplifiers – With semiconductor amplifying device – Including frequency-responsive means in the signal...
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Alarm system having alarm transmitter indentification codes and

Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent

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Profile ID: LFUS-PAI-P-32101

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