When Was the First Workable Ballpoint Pen Patented?
When Was the First Workable Ballpoint Pen Patented? The first workable ballpoint pen was patented in 1937 by László József Bíró, a Hungarian living in Argentina, but...
Read MoreWhen Was the First Workable Ballpoint Pen Patented? The first workable ballpoint pen was patented in 1937 by László József Bíró, a Hungarian living in Argentina, but...
Read MoreHow Are Sewing Needles Made? A sewing needle is a long slender tool with a pointed tip that is used for stitching. A hand sewing needle has a hole on the non pointed...
Read MoreWhat Is the History of the Pen? When the ancient Egyptians wrote on their papyrus rolls, they used a sharpened reed dipped in dye. After paper was introduced, people...
Read MoreWhat Are Icebergs? An iceberg is a mountain of ice floating in the sea. It was once part of a glacier. In many places glaciers flow right down to the sea. At the...
Read MoreHow Are Felt-tip Markers Made and How Do They Work? A felt-tip marker is a pen which has its own ink-source, and a tip made of porous, pressed fibers such as felt....
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