DE1308873U
(Direct )
GB548932A
(en )
1942-10-29
Telephone systems
DE1308872U
(Direct )
GB313010A
(en )
1930-03-13
Improvements in and relating to incandescent electric lamps
DE280693C
(Direct )
DE194357C
(Direct )
DE146913C
(Direct )
DE1397087U
(Direct )
DE403667C
(de )
1924-10-02
Elektrische Leuchtroehre
DE222466C
(Direct )
DE86578C
(Direct )
CH221760A
(fr )
1942-06-15
Procédé pour la fabrication de réclames dites fluorescentes ou phosphorescentes et réclame obtenue par ce procédé.
DE59622C
(de )
Glühlampe für Drehstrombetrieb
DE579810C
(de )
1933-07-01
Elektrische Leuchtroehre
DE1317246U
(Direct )
DE571988C
(de )
1933-03-08
Verfahren zur teilweisen Verspiegelung von Glasgegenstaenden
DE383115C
(de )
1923-10-16
Glimmlichtlampe
DE281767C
(Direct )
DE81381C
(Direct )
DE191928C
(Direct )
US419829A
(en )
1890-01-21
Electric lamp
DE1298024U
(Direct )
DE1317799U
(Direct )
DE226980C
(Direct )
GB374986A
(en )
1932-06-23
Improvements in or relating to connections between filaments and leading-in wires ofelectric incandescent lamps and the like