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DATAMP Patents by Date for April 1919
This table shows the number of the first patent in the DATAMP database for each date, broken down by patent type.
DateUtilityReissueDesignXAIPatents
11,299,208-D53,161--[datamp][all]
81,299,488----[datamp][all]
151,300,243----[datamp][all]
221,301,159----[datamp][all]
291,301,891RE14,640D53,260--[datamp][all]