Ball-point pen with back flow stop

Ballpoint pen

Ballpoint pen and cap therefor

Ballpoint pen containing an aqueous ink composition

Ballpoint pen having a backflow preventing mechanism

Ballpoint pen nib provided with a stem with communication...

Ballpoint pen refill and fabrication method thereof

Ballpoint pen tip

Ballpoint pen tip and ballpoint pen using the same

Ballpoint pen tip, ballpoint pen utilizing the ballpoint pen...

Ballpoint pen tip, manufacturing method therefor, and ballpoint

Ballpoint pen with a ball bearing of shape memory alloy

Ballpoint pen with metallic rod ball seat

Ballpoint tip for ballpoint liquid container

Barrel cylinder for writing instrument

Binder for reservoir tubes

Building layout marker