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1937's Plant Patent Counts
month
first
count
January
PP211
20
February
PP231
5
March
PP236
5
April
PP241
7
June
PP248
6
July
PP254
5
August
PP259
3
September
PP262
1
October
PP263
1
November
PP264
1
December
PP265
1
Total:
55
1936
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1938