Number | Name | Date | Kind |
---|---|---|---|
1388505 | Bamforth | Aug 1921 | |
3460834 | Nickel | Aug 1969 | |
3768811 | Goldfarb et al. | Oct 1973 | |
3863926 | White et al. | Feb 1975 | |
4277066 | Hough | Jul 1981 |
Number | Date | Country |
---|---|---|
715927 | Aug 1965 | CAX |
758568 | Oct 1956 | GBX |
1321071 | Jun 1973 | GBX |
Entry |
---|
"Box Clever", Games and Puzzles, 1977, p. 20. |