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DATAMP Patents by Date for April 1947
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
12,418,220----[datamp][all]
82,418,639----[datamp][all]
152,418,901-D146,608--[datamp][all]
222,419,433----[datamp][all]
292,419,639----[datamp][all]