4. H - Electricity
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Donald P. Northrop

H - Electricity – 01 – J

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Fluorescent lamp with reduced wattage consumption having...

H - Electricity – 01 – J
Patent

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Fluorescent lamps and method of manufacturing the same

H - Electricity – 01 – J
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Fluorescent lamps and method of manufacturing the same

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Fluorescent lamps with grooves and method and apparatus for...

H - Electricity – 01 – J
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Scotopic afer-glow lamp

H - Electricity – 01 – J
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Scotopic afer-glow lamp

H - Electricity – 01 – J
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Profile ID: LFCA-PAI-P-129616

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