Proprietà:Patent title
Titolo del brevetto (come riportato sullo stesso).
P
Mechanical pencil +
Clip for fountain-pen caps or the like +
Improvement in writing-pens +
Pencil +
Chart for fountain-pens +
Fountain-pen +
Fountain-pen +
Fountain-pen +
Feed-bar for fountain-pens +
Fountain-pen clip +
Self-filling fountain-pen +
Fountain-pen +
Fountain-pen +
Fountain-pen indicator +
Toggle-joint self-filling pen +
Fountain-pen +
Fountain-pen attachment +
Ink-content-indicating fountain-pen +
Fountain and other reservoir-pen +
Fountain-pen +