Proprietà:Patent title
Titolo del brevetto (come riportato sullo stesso).
P
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 +
Writing instrument +
Fountain pen cap +
Dual-well fountain pen +
Magnetic desk set +
Pen desk set +
Fountain pen +
Writing instrument +
Slider for propelling pencils with several leads +
Fountain pen +
Desk penholder +