This last feature was a practical drawback to the system, which was patented in 1877.
The same principle was utilised in his type-printing telegraph, patented in 1841.
He had no money even to pay the fees necessary to get it patented.
This was patented in 1872, and McCormick soon made it his own.
He completed and patented his first lubricating cup in 1872.
Each suggests ...