Number | Name | Date | Kind |
---|---|---|---|
5465084 | Cottrell | Nov 1995 | |
5559961 | Blonder | Sep 1996 | |
5608387 | Davies | Mar 1997 | |
5821933 | Keller et al. | Oct 1998 |
Number | Date | Country |
---|---|---|
0 677 801 A1 | Oct 1995 | EP |
60-171560 | Sep 1985 | JP |
61-142835 | Jun 1986 | JP |
9-128208A | May 1997 | JP |
Entry |
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Knowledge Adventure, Inc., JumpStart Toddlers User's Guide, Knowledge Adventure, Inc., 1996, pp. 1-18. |