| D332986 | Tent | February, 1993 | Choi | D21/253 |
| D344121 | Modular play equipment enclosure | February, 1994 | Warren | D21/240 |
| D352759 | Screen house tent | November, 1994 | Cantwell | D21/253 |
| D366511 | Children's play ball enclosure | January, 1996 | Coddington, Jr. | D21/240 |
| 4077623 | Exercising game apparatus | March, 1978 | Clausell | |
| 4433838 | Exercise structure and ball game | February, 1984 | Gordon | |
| 4569515 | Exercise structure and ball game | February, 1986 | Gordon | |
| 4900011 | Exerciser and playpen structure having a trampoline like bottom | February, 1990 | Nolet |
FIG. 1 is a right, front perspective view of a ball cage showing the new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.