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DATAMP Patents by Date for March 1939
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
72,149,940----[datamp][all]
142,150,184----[datamp][all]
212,151,255-D113,860--[datamp][all]
282,151,852----[datamp][all]