The Great Exhibition (of the Works of Industry of all Nations) held in London's Crystal Palace five years before 1856 was a seminal world's fair which exhibited much of the leading technology of its day. An online essay on its American contributions is found here.
In the course of 1856, the US Patent Office issued 2,520 patents of all types.
There were TWENTY-EIGHT patents - over 1% of the total - related to "Crop threshing or separating", such as the one immediately below. Note that the inventor, although originally from the "old North," Pennsylvania, now resided in the "new West", the recently admitted state of California. Also note he assigns the rights for the patent to someone from the "old West", Illinois, where he himself had also previously resided. The age of the author is not recorded, but perhaps he is someone who took the advice to Go West, young man!
But there were only SEVEN patents related to "Photography", such as one immediately below. Notice that the patent was issued only 5 days after the dramatic physical assault of US Senator Charles Sumner by US House member Preston Brooks, and that ironically, the two inventing partners came from the North (Ohio) and the South (Tennessee).
There was only ONE lonely patent related to