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DATAMP Patents by Date for April 1921
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
51,373,621----[datamp][all]
121,374,345-D57,548--[datamp][all]
191,374,967----[datamp][all]
261,375,690RE15,093D57,576--[datamp][all]