Until what year did László Bíró hold patents related to his ballpoint pen creation?
Answer
1985
László Bíró maintained his professional involvement with his creation, holding patents related to the ballpoint pen until the time of his death in 1985.
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Invention of A Pen | The Dr Binocs Show | Peekaboo Kidz - YouTube
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What primarily frustrated László Bíró and led to the invention?Who was the chemist that collaborated with László Bíró?What made the ink developed by the Bíró brothers effective for the new delivery system?What crucial mechanical element delivered the ink to the page?When and where was the patent for the groundbreaking ballpoint device filed?Which entity showed significant early interest in the pen due to altitude writing issues?What was the name of the company the Bíró brothers established in Argentina in 1940?What was the initial high price for a ballpoint pen when introduced to the US market in 1945?Which French manufacturer is credited with making the ballpoint pen affordable for the mass market?What concept did the text state was the true invention, not just the ink or mechanism alone?Until what year did László Bíró hold patents related to his ballpoint pen creation?