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DATAMP Patents by Date for April 1942
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
72,278,988RE22,061---[datamp][all]
142,279,710RE22,071---[datamp][all]
212,280,229----[datamp][all]
282,281,353----[datamp][all]