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Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments
(AREA)
Abstract
Un lápiz-bolígrafo, caracterizado por el hecho de que en un solo cuerpo hueco, va dispuesto por una parte, un mecanismo portador e impulsor de una mina de lápiz, y por la otra parte, los elementos componentes de un bolígrafo, de manera que por uno de sus extremos puede usarse como lápiz y por el otro como bolígrafo.