Pressurizing device for ink reservoirs of writing instruments
FR1497176A
Shutter device for monitoring the ink level of a cartridge
ES332441A1
A following device for the ink mass communicating with the tip of the writing receptacle at an end of a tubular writing cartridge. (Machine-translation by Google Translate, not legally binding)
US3414359A
Writing element construction
US3420610A
Writing instruments and self-pressurizing assemblies therefor
US3334616A
Ink utilization in writing instruments
US3282254A
Multi-purpose connector
GB1058098A
Project-retract mechanism for a ball point writing instrument
US3297167A
Multi-aspect display device
US3183892A
Project-retract mechanism for a ballpoint writing instrument
US3136473A
Box construction
US3140694A
Refillable and retractable lead pencil
US2965238A
Display device for edgewise mounting of elongated articles
US2987192A
Display device
US2992904A
Method of etching metallic writing balls
GB835660A
Ball point seating method and apparatus
GB878220A
Improvements in or relating to pilfer-deterrent sales package
