Uback horse racing game patent specification, Chad Valley Co Ltd, 1922. This patent was 1922 with the proper UK patent number. At this time the patent office decided that the way to stop people from copying and infringing copyright was to make the original patent details available to the public. This patent looks as though it might have been ordered by a Dutch company with the library stamp on it. But the number 199,666 looks like a US patent number (possibly overprinted).