Proprietà:Patent title
Titolo del brevetto (come riportato sullo stesso).
P
Fountain pen +
Mechanical pencil with step-by-steplead feeding means +
Clip for writing instruments +
Clip for writing instruments +
Clip for writing instruments +
Fountain pen +
Changeable propelling pencil +
Ball-point writing instrument +
Writing instrument +
Fountain pen +
Mechanical pencil +
Stable blue writing ink and a dye therefor +
Fountain pen +
Fountain pen +
Fountain pen +
Fountain pen +
Pen desk set +
Pen desk set +
Mechanical pencil with push-button type lead feeding means +
Magazine pencil with rotary lead propelling means +