首页>
外国专利>
A new special Ink to be applied to the Morse Telegraph apparatus, to Impregnate The Cutter Roller printer, replacing the currently used Filter, called 'Inkwell Cadavid'.
A new special Ink to be applied to the Morse Telegraph apparatus, to Impregnate The Cutter Roller printer, replacing the currently used Filter, called 'Inkwell Cadavid'.