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DE614471C
(de )
1935-06-08
Halterung fuer die Gluehdrahtwendeln elektrischer Gluehlampen sehr hoher Leistungsaufnahme
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DE264156C
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DE274488C
(de )
1914-05-23
Fadentraggestell fuer elektrische Gluehlampen
DE1558712A1
(de )
1970-04-23
Verfahren zur Herstellung von Heizfadenmaterialien
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DE272532C
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DE204317C
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AT82469B
(de )
1921-01-25
Elektrische Metallfaden-Glühlampe.
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DE258160C
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DE410345C
(de )
1925-02-26
Kathodenroehre mit konzentrisch angeordneter Anode, Kathode und Gitter
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DE277570C
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DE721452C
(de )
1942-06-05
Elektrische Roehrengluehlampe mit glattem Leuchtdraht, insbesondere fuer optische Zwecke
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DE247493C
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DE275254C
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DE181817C
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