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DEBERGMANN ELEK CITAETS WERKE
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DEBERGMANN ELEK CITAETS WERKE
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Application filed by DEBERGMANN ELEK CITAETS WERKEfiledCriticalDEBERGMANN ELEK CITAETS WERKE
Application grantedgrantedCritical
Publication of FR12119EpublicationCriticalpatent/FR12119E/fr
H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
FR12119D1908-10-011910-01-24Procédé pour empecher les filaments métalliques des lampes électriques à incandescence de se volatiliser
ExpiredFR12119E
(fr)