Henry Blair was born in Maryland (USA) in 1807. There is not much known about his personal life, only that he didn’t knew how to write nor read, he was a farmer and the fact that he was the second black man to receive a patent. The Corn Planter is the first patent he obtained(1834). The second one was a few years later, the Cotton Planter.
The planter resembled a wheelbarrow, with a compartment to hold the seed and rakes dragging behind to cover them. This device enabled farmers to plant their crops more efficiently and enable a greater total yield. This machine was the first of many like this, which developed throughout the centuries. Even now a days, farmers still use this machines (much more modern ones of course). This is a video of one: https://youtu.be/txQTUyP3ENs.