Proprietà:Patent title

Titolo del brevetto (come riportato sullo stesso).

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Writing instruments  +
Fountain pen nib mounting  +
Fountain pen-holder  +
Filler device for fountain pens  +
Clip mountings for fountain pens  +
Fountain-pen  +
Modular fountain pen  +
Fountain-pen  +
Self-filling fountain pens  +
Fountain pen  +
Fountain-pen  +
Fountain pen  +
Clip mounting device for writing tools  +
Fountain pen  +
Retractable closure for pen casings  +
Retractable nib fountain-pen  +
Nib unit fixing device for writing pens  +
Fountain-pen  +
Fountain attachment for pens  +