The present invention provides a pen which includes a marking device, the pen being operative to mark a visible path onto a surface, the marking device being electronically controllable to change an attribute of the path, the pen including a user interface whereby a user may modify the attribute, the pen including at least one sensing device for sensing images or colors or both.

 
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< Magnetic absolute angular position sensor for valves controlled by electric part-turn actuators

< Contact unit

> Device for machining by electroerosion

> Foldable, refillable, sustained-release fluid delivery system

~ 00217