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DATAMP Patents by Date for March 1921
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
11,369,784----[datamp][all]
81,370,642-D57,239--[datamp][all]
151,371,350-D57,323--[datamp][all]
221,372,033----[datamp][all]
291,372,869----[datamp][all]