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DATAMP Patents by Date for April 1933
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
41,903,373----[datamp][all]
111,903,514----[datamp][all]
181,904,115----[datamp][all]
251,905,560----[datamp][all]