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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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Rising number of patents (200 to 4,000/year) (1 mayo 1820 año – 1 mar 1860 año)
Añadido al timeline:
APUSH Chapter 8
By
Cate
11 nov 2022
0
0
452
fecha:
1 mayo 1820 año
1 mar 1860 año
~ 39 years
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