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Ballpoint pen can be best described as a type of pen that dispense ink over a metal ball at its point. The first patent for a ballpoint pen was issued in 1888, but it was not commercially viable. Lásló Bíró, frustrated by issues with fountain pens, created an ink formulation in the 1930s that worked well with a ballpoint mechanism. This innovation coupled thick ink with a ball socket to prevent drying. Bíró filed a patent for the modern ballpoint pen in 1938. Ballpoint pens had a significant impact by allow

Author

Đăng Sơn

Language

EN