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The ornamental design for a biorhythm calendar, as shown and described. |
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FIG. 1 is a front elevational view of a combined biorhythm calendar with interpretive illustrations, showing my new design;
FIG. 2 is a side elevational view thereof; and
FIG. 3 is a top plan view thereof.
The opposite side of FIG. 1 is plain and unornamented.
| Patent | Priority | Assignee | Title |
| D610611, | Dec 04 2007 | Robert, Feyereisen | Calendar |
| D967257, | Nov 16 2020 | Daily status chart set |
| Patent | Priority | Assignee | Title |
| 4131790, | Apr 18 1977 | PRESTOLITE POWER CORPORATION | Biorhythm indicator |
| 4179610, | Dec 12 1977 | Apparatus to indicate bio-rhythm curves |
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