| Number | Name | Date | Kind |
|---|---|---|---|
| 1541004 | Taylor | Jun 1925 | |
| 1860627 | Sherman | May 1932 | |
| 2496810 | Nerrie | Feb 1950 | |
| 2751634 | Washington | Jun 1956 | |
| 3315376 | Nielsen | Apr 1967 | |
| 3592469 | Glass et al. | Jul 1971 | |
| 4114307 | Liebeskind | Sep 1978 | |
| 5172534 | Milner et al. | Dec 1992 |
| Number | Date | Country |
|---|---|---|
| 535765 | Dec 1958 | BEX |
| 123615 | Mar 1919 | GBX |
| Entry |
|---|
| Booklet entitled: "Rubik's Snake", OddzOn Products, Inc. 1995. |
| Before 1950--Wooden Carpenter's Ruler. |