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The ornamental design for a calculator, as shown and described. |
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FIG. 1 is a side elevational view of a calculator showing our new design.
FIG. 2 is a top plan view thereof.
FIG. 3 is a front elevational view thereof.
FIG. 4 is a bottom plan view thereof.
FIG. 5 is a rear elevational view thereof.
FIG. 6 is a right side elevational view thereof.
Faranda, Robert T., Leer, Stuart D.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Oct 29 1979 | Litton Business Systems, Inc. | (assignment on the face of the patent) | / | |||
| Oct 16 1984 | MONROE SYSTEMS FOR BUSINESS, INC A NE CORP | MELLON BANK NATIONAL ASSOCIATION | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 004321 | /0976 | |
| Nov 26 1984 | LITTON BUSINESS SYSTEMS, INC A NY CORP | MONROE SYSTEMS FOR BUSINESS, INC A NE CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004423 | /0130 | |
| Sep 18 1990 | MONROE SYSTEMS FOR BUSINESS, INC , A CORP OF NV | MELLON BANK EAST PSFS NATIONAL ASSOCIATION | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 005652 | /0030 |
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