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Individual
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Individual
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Priority to ES83158UpriorityCriticalpatent/ES83158Y/en
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Publication of ES83158YpublicationCriticalpatent/ES83158Y/en
Investigating, Analyzing Materials By Fluorescence Or Luminescence
(AREA)
Glass Compositions
(AREA)
Illuminated Signs And Luminous Advertising
(AREA)
Abstract
Improved electrical switch, characterized by disposing on the risible surface of the mounting base plate, a layer of phosphorescent material that covers a certain area more or less large, which gives them a luminescence of their own that clearly indicates their situation in the darkness. (Machine-translation by Google Translate, not legally binding)
Improvements in the devices for the power supply and protection of electrical current lines (Machine-translation by Google Translate, not legally binding)
Improvements introduced in appliances to establish telephone communication without marking the number in the disc. (Machine-translation by Google Translate, not legally binding)