A writing instrument that includes a barrel extending along a longitudinal axis (A) and a tip mounted at the front of the barrel, further including a protective sleeve for the tip, the sleeve being mounted coaxially on the barrel and movable relative to the barrel between a protective position where it covers the tip and a retracted position where it exposes the tip to allow writing. The sleeve includes an inner wall which includes a helical cam engaging with a guide element formed on the barrel so that the sleeve is movable in translation combined with rotation.

A writing instrument that includes a barrel extending along a longitudinal axis (A) and a tip mounted at the front of the barrel, further including a protective sleeve for the tip, the sleeve being mounted coaxially on the barrel and movable relative to the barrel between a protective position where it covers the tip and a retracted position where it exposes the tip to allow writing. The sleeve includes an inner wall which includes a helical cam engaging with a guide element formed on the barrel so that the sleeve is movable in translation combined with rotation.

An apparatus including a body configured to house a writing tool therein and a sharpener connected to the body. The sharpener is configured to allow a user to sharpen a knife by gripping the body and sliding the knife on the sharpener.

An apparatus including a body configured to house a writing tool therein and a sharpener connected to the body. The sharpener is configured to allow a user to sharpen a knife by gripping the body and sliding the knife on the sharpener.

A card shaped pen (13) with retractable pen tips designed to be stored in the card slot of a wallet, purse, and other credit card or business card holders. The shape is optimized to make it easy to slide in and out of a card slot and to make it comfortable for a user to hold. Each of the pen tips (7) have their own ink cartridge and sliding switches, enabling the use of multiple colors in the pen. Each pen tip is extended and retracted using its sliding switch (1), which locks in the fully open and fully closed positions. Thus a versatile pen is providedthat can be conveniently carried on person every day.

A card shaped pen (13) with retractable pen tips designed to be stored in the card slot of a wallet, purse, and other credit card or business card holders. The shape is optimized to make it easy to slide in and out of a card slot and to make it comfortable for a user to hold. Each of the pen tips (7) have their own ink cartridge and sliding switches, enabling the use of multiple colors in the pen. Each pen tip is extended and retracted using its sliding switch (1), which locks in the fully open and fully closed positions. Thus a versatile pen is providedthat can be conveniently carried on person every day.

A card shaped pen (13) with retractable pen tips designed to be stored in the card slot of a wallet, purse, and other credit card or business card holders. The shape is optimized to make it easy to slide in and out of a card slot and to make it comfortable for a user to hold. Each of the pen tips (7) have their own ink cartridge and sliding switches, enabling the use of multiple colors in the pen. Each pen tip is extended and retracted using its sliding switch (1), which locks in the fully open and fully closed positions. Thus a versatile pen is providedthat can be conveniently carried on person every day.

A card shaped pen (13) with retractable pen tips designed to be stored in the card slot of a wallet, purse, and other credit card or business card holders. The shape is optimized to make it easy to slide in and out of a card slot and to make it comfortable for a user to hold. Each of the pen tips (7) have their own ink cartridge and sliding switches, enabling the use of multiple colors in the pen. Each pen tip is extended and retracted using its sliding switch (1), which locks in the fully open and fully closed positions. Thus a versatile pen is providedthat can be conveniently carried on person every day.