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			 The ornamental design for a toy hippopotamus, as shown.  | 
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FIG. 1 is a perspective view of a toy hippopotamus showing our 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.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Jul 23 1984 | SATO, AKITO | PILOT INK CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 004591 | /0411 | |
| Aug 02 1984 | Pilot Ink Co., Ltd. | (assignment on the face of the patent) | / | 
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