A ballpoint pen is a writing instrument with an internal ink reservoir and a sphere for a point. The internal chamber is filled with a viscous ink that is dispensed at its tip during use by the rolling action of a small sphere. The sphere, usually from 0.5 mm to 1.2 mm in diameter, may be made of brass, steel, tungsten carbide,[1] or any durable, hard (nondeformable) material.
it was invented by hungarian brother ,Lazlo and george biro in 1894.It was followed by the first fountain pen made by L.E.waterman in 1884. always try to invent new things
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