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Pin by Peter Vaľo on Utility | Industrial design sketch, Pen design, Geometric shapes drawing
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the diagram shows an apparatus and its components
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US6623136B1 - Pen with lighted scanner pen head and twist switch

Description BACKGROUND OF THE INVENTION (a) Field of the Invention The present invention is related to a pen with lighted scanner pen head and a twist switch, and more particularly, to a lighted pen for writing and a scanner for touch screen with its lighting and retractable pen refill controlled by the twist switch. (b) Description of the Prior Art A pen generally available in the market is simply for writing purpose. To improve its practicability, a bulb or LED, or red light beam emission...
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