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1851 was the year of the first official gold discoveries in Australia.
A license given to those who wanted to mine gold in 1851, Australia. It was not free, though, and very expensive.
1851
1851
1879
The main one was in 1845-1851 but it continued for decades afterwards
7,000,000 according to USPTO
William Lassell in 1851
In the US, 276,788 patents were awarded in calendar year 2012. A surprisingly detailed list is linked below.
This speech was given by Sojourner Truth at the Women's Convention in Akron, Ohio, on May 29, 1851.
1851 was the year that the first payable gold was discovered in Australia.
Herman Melville wrote "Moby Dick" in 1851.