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The Fountain Pen Patent Archive

The instruments that put ink under pressure

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Compressor valve pen

Two vertical patent drawings of a hard rubber fountain pen in longitudinal section, one shown open with the point exposed and internal flexible tube and compressor visible, the other shown with the protective cap fitted over the nib end, with lettered parts labeling the barrel, tube, compressor, and nib.

FOUNTAIN-PEN.Robert Christopher Frampton · January 29, 1889

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