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Sodium-vapour discharge lamp

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313/136, 261/18

Patent

CA 680351

Grouw Coenraad M. La

C - Chemistry – Metallurgy – 03 – C
Inventor

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Spiessens Raymond F.

H - Electricity – 01 – J
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Van de Weijer Martinus H.a.

H - Electricity – 01 – J
Inventor

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N.v. Philips Gloeilampenfabrieken

G - Physics – 06 – F
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