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The ornamental design for an aquarium filter, substantially as shown. |
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FIG. 1 is a perspective view of an aquarium filter, showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a front elevational view;
FIG. 4 is a right side elevational view;
FIG. 5 is a rear elevational view; and
FIG. 6 is a bottom plan view.
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| D280658, | May 06 1983 | WILLINGER BROS INC | Aquarium filter |
| D295658, | Apr 10 1985 | Filter for the recovery of embryos in animal artificial insemination processes | |
| D470217, | May 30 2002 | Aquarium filter | |
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 22 1977 | WILLINGER, ALLAN H | WILLINGER BROS , INC | CORRECTIVE ASSIGNMENTS, SEE DOCUMENT FOR DETAILS | 006676 | /0033 | |
| Apr 26 1977 | Willinger Bros., Inc. | (assignment on the face of the patent) | / |
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