1970's Plant Patent Counts

yearfirstcount
1970PP2,95952
1971PP3,01152
1972PP3,063218
1973PP3,281132
1974PP3,413261
1975PP3,674150
1976PP3,824177
1977PP4,001173
1978PP4,174186
1979PP4,360131
 Total:1,532

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