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The ornamental design for an aquarium heater, as shown and described. |
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FIG. 1 is a front elevational view of an aquarium heater, showing my new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof.
The conventional electrical cord has been shown fragmentarily in FIGS. 1-4 for ease of illustration.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 07 1980 | HOLBROOK ARTHUR J | ROLF C HAGEN USA CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 003846 | /0568 | |
| Nov 14 1980 | Rolf C. Hagen (USA) Corp. | (assignment on the face of the patent) | / |
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