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DATAMP Patents by Date for June 1920
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
11,341,841-D55,387--[datamp][all]
81,342,848----[datamp][all]
151,343,257----[datamp][all]
221,344,096----[datamp][all]
291,344,629----[datamp][all]