Proprietà:Patent title
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Titolo del brevetto (come riportato sullo stesso).
P
Fountain pen +
Fountain-pen +
Improvement in alloys for the manufacture of pens +
Fountain-pen +
Self-filling fountain-pen +
Fountain-pen +
Fountain-pen cap +
Lever-filler for fountain-pens +
Pencil-clip +
Fountain-pen +
Stylographic fountain-pen +
Fountain-pen +
Penholder-clip +
Fountain-pen +
Fountain-pen +
Mechanical pencil +
Pressure-bar mechanism +
Fountain-pen +
Retarded delivery device for fountain-pens +
Fountain-pen-filling device +