Number | Name | Date | Kind |
---|---|---|---|
D212242 | Paulos | Sep 1968 | |
610577 | Baldwin | Sep 1898 | |
1439336 | Smith | Dec 1922 | |
1856650 | McLintock et al. | May 1932 | |
2987318 | Hammer | Jun 1961 | |
3235263 | Smith | Feb 1966 | |
3608906 | Odier | Sep 1971 | |
3726027 | Cohen et al. | Apr 1973 | |
3865382 | Myller | Feb 1975 |
Number | Date | Country |
---|---|---|
1,108,410 | Aug 1955 | FR |
1,242,975 | Aug 1971 | UK |
Entry |
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Oz Jig Saw Cubes Advertisement, Oz Puzzle Co., Watertown, Conn., 1 page, copyright 1975. |
Alphabet Cube Advertisement, Parade Magazine, Nov. 12, 1972, p. G6. |