Actuator structure for ball-point pens and other writing instrum

Cartridge type feeding container

Composite writing tool

Composite writing utensil

Composite writing utensil

Compound writing instrument

Multi-color writing utensil

Multicolor pen

Multiple-point writing instrument including a mechanical pencil

Multiplex writing implement

Pen construction

Pen with retractable point

Pen with selective multi-color cores

Rotary bar-projecting mechanism for push-button implement

Writing device with at least two writing elements

Writing implement including an input stylus

Writing implement including an input stylus

Writing instrument

Writing instrument

Writing unit locking mechanism in a multiple-point writing imple