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The ornamental design for a calculator, substantially as shown and described. |
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FIG. 1 is a left end elevational view of a calculator showing my new design;
FIG. 2 is a right end elevational view;
FIG. 3 is a front elevational view;
FIG. 4 is a rear elevational view;
FIG. 5 is a bottom plan view; and
FIG. 6 is a top plan view.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Dec 20 1984 | ZATEZALO, JOHN M | INDUSTRIAL MAINTENANCE SYSTEMS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 004354 | /0471 | |
| Dec 26 1984 | Industrial Maintenance Systems, Inc. | (assignment on the face of the patent) | / |
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