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Individual
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Individual
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Priority to ES1981256892UpriorityCriticalpatent/ES256892U/en
Publication of ES256892UpublicationCriticalpatent/ES256892U/en
Improved slate, characterized essentially by the fact that it is constituted by a base sheet of luminescent properties, covered on one of its faces by a film of transparent plastic material on which graphics can be made by a special marker that allows erasure at will of the trace, and whose graphics are visible by contrast on the luminescent zone provided by said base sheet, said luminescence being sufficient to allow the use of the slate in the dark. (Machine-translation by Google Translate, not legally binding)
ES1981256892U1981-02-211981-02-21Perfected slate (Machine-translation by Google Translate, not legally binding)
PendingES256892U
(en)
Procedure for the manufacture of petreas boards, forming any kind of figures intercaled with translucent or transparent zones. (Machine-translation by Google Translate, not legally binding)