| Number | Name | Date | Kind |
|---|---|---|---|
| D252908 | Bayly | Sep 1979 | |
| D252909 | Bayly | Sep 1979 | |
| D252910 | Bayly | Sep 1979 | |
| D252977 | Bayly | Sep 1979 | |
| D252978 | Bayly | Sep 1979 | |
| D252979 | Bayly | Sep 1979 | |
| D252980 | Bayly | Sep 1979 | |
| D252981 | Fenton | Sep 1979 | |
| D301260 | McLaughlin et al. | May 1989 | |
| D319019 | Shanklin et al. | Aug 1991 | |
| D322938 | Baroi | Jan 1992 | |
| D333978 | Zutler | Mar 1993 | |
| D349046 | Brown | Jul 1994 | |
| 1771264 | Marrits | Jul 1930 | |
| 2631747 | Stolte | Mar 1953 | |
| 3374917 | Troy | Mar 1968 | |
| 3422564 | Izumi | Jan 1969 | |
| 3616943 | Brink | Nov 1971 | |
| 3640018 | Light | Feb 1972 | |
| 3815281 | Kander | Jun 1974 | |
| 4076123 | Davis | Feb 1978 | |
| 4120396 | Mascia et al. | Oct 1978 | |
| 4582447 | Itoh | Apr 1986 | |
| 4656840 | Loofbourrow et al. | Apr 1987 | |
| 4883251 | Manas | Nov 1989 |
| Entry |
|---|
| Popular Science--p. 20--Aug. 1992, building blocks. |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 27425 | Aug 1994 |