The Swan, Edison & Swan, Ediswan, and Royal Ediswan Companies
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Fullolite & Daylight 1921 - UK |
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Automotive Halogen 1972 - UK |
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Compagnie Française Thomson-Houston (CFTH), Compagnie des Lampes & absorbed companies
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Discharge Lamps 1939 - France 4 |
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Discharge Lamps 1964 - Germany 4 |
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