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1950's Plant Patent Counts
month
first
count
January
PP911
8
February
PP919
7
March
PP926
4
April
PP930
8
May
PP938
8
June
PP946
11
July
PP958
12
August
PP970
8
September
PP978
4
October
PP982
4
November
PP986
10
December
PP996
5
Total:
89
1949
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1951