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nited States Patent system established.
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nited States Patent system established.
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Owner:This_Day_In_History
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Created:Jan 24, 2008
Modified: Jul 19, 2011
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Fold3, Today In History- April 10 (https://www.fold3.com/memorial/2294/today-in-history-april-10/facts : accessed May 6, 2024), database and images, https://www.fold3.com/memorial/2294/today-in-history-april-10/facts