| Number | Name | Date | Kind |
|---|---|---|---|
| 448574 | Richards | Mar 1891 | |
| 1202191 | King | Oct 1916 | |
| 3109652 | Strand et al. | Nov 1963 | |
| 3765682 | Braude | Oct 1973 | |
| 4324406 | Ocampo | Apr 1982 | |
| 4333654 | Allain | Jun 1982 |
| Entry |
|---|
| "A History of Board Games" by H. J. R. Murray, 1952, pp. 158-165, 171, 177, 190, 205-207 and 211. |