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Hans Lippershey invented the telescope, benefitting the astronomy community. -
Blaise Pascal had invented the "adding machine" which has helped with bookkeeping calculations. Today, we have similar versions shown through a calculator. -
Evangelista Torricelli invented the barometer which has greatly influenced weather predictions. -
Otto von Guericke had invented an air pump that was used to create a partial vacuum. -
Sebastian Le Prestre had invented the bayonet, which has allowed soldiers to defend themselves even after they have already fired their shots.