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About
1940's Plant Patent Counts
year
first
count
1940
PP352
85
1941
PP437
62
1942
PP499
65
1943
PP564
47
1944
PP611
38
1945
PP649
17
1946
PP666
56
1947
PP722
52
1948
PP774
44
1949
PP818
93
Total:
559
1930's
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