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Application filed by Carl BlankefiledCriticalCarl Blanke
Publication of CH900ApublicationCriticalpatent/CH900A/de
Mit aus Elementarfiltern der verschiedenen Grundfarben zusammengesetzten Mehrfarbenraster versehene, lichtempfindliche Platte oder Film zur Herstellung von Photographien in natürlichen Farben auf Papier
Un procedimiento para la producción de las placas destinadas a imprimir dibujos policromos, mediante capas transparentes, pintadas o dibujadas en un solo color, cuyas tapas puestas unas sobre otras producen una pintura o un dibujo policromo completo.
Improvements in Educational Appliances for Teaching Form and Colour and Colour Combinations, or the Alphabet and Colour and Colour Combinations in Schools.