Ink backflow preventive for water-based ball-point pens
Ink compositions and writing instruments including the compositi
Ink follower
Ink follower composition for ballpoint pen and ballpoint pen usi
Ink follower composition for ballpoint pen and ballpoint pen...
Ink follower composition for oil-based ballpoint pens
Ink follower for aqueous ballpoint pen using gel-like material a
Ink follower for water-based ink ballpoint pen
Ink follower for writing tool
Ink follower in conjunction with ink in a writing instrument...
Ink follower piston for a ball-point pen, and a method of...