Water-based ink composition for ballpoint pen and...

Writing element for use in ball point pen

Writing implement

Writing implement

Writing implement

Writing implement

Writing implement

Writing implement and a fabricating method thereof

Writing implement for ink

Writing implement having a replaceable refill

Writing implement ink conducting core

Writing implement with improved cartridge holder

Writing implement with pivoting roller

Writing instrument

Writing instrument

Writing instrument

Writing instrument

Writing instrument barrel and method of forming a writing instru

Writing instrument cap

Writing instrument housing