Allan R. Kmetz

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Digital voltmeter with electro-optical indication of the wavefor

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
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Display device having adjoining display elements, and a method o

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
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Electro-optical device for the display of dark symbols composed

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
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Electro-optical device for the display of dark symbols composed

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Electro-optical display device using a liquid crystal cell

Communications: electrical – Systems – With specific power supply
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Profile ID: LFUS-PAI-P-420613

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