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The ornamental design for a handheld calculator, substantially as shown and described. |
FIG. 1 is a top right perspective view of _a handheld calculator showing our new design;
FIG. 2 is a top plan view of the handheld calculator shown _in FIG. 1;
FIG. 3 is a right side elevational view of the _handheld calculator; and
FIG. 4 is a front end view of the handheld calculator.
The bottom of the handheld calculator is plain and unornamented.
Ichikawa, Shinpei, Lawrence, William J.
Patent | Priority | Assignee | Title |
D269356, | Mar 20 1981 | Canon Kabushiki Kaisha | Desk top electronic calculator |
D307032, | Jan 07 1987 | Sharp Corporation | Electronic calculator with solar cell |
D323488, | Dec 18 1989 | ABL IP Holding, LLC | Control panel |
D357496, | Mar 09 1993 | Checkbook calculator | |
D546871, | Dec 22 2005 | Casio Keisanki Kabushiki Kaisha | Electronic calculator |
D604282, | Mar 31 2008 | Vertu Corporation Limited | Set of keys for a handset |
D605186, | Mar 31 2008 | Vertu Corporation Limited | Set of keys for a handset |
D766910, | Nov 11 2014 | Set of trigonometry calculator keys |
Patent | Priority | Assignee | Title |
4092527, | Jan 31 1977 | Texas Instruments Incorporated | Calculator with interchangeable keyset |
4104728, | Jun 06 1973 | Sharp Kabushiki Kaisha | Electronic apparatus equipped on a flexible substratum |
D251330, | Feb 17 1977 | Matsushita Electric Industrial Co., Ltd. | Combined calculator, clock and alarm |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 15 1979 | Texas Instruments Incorporated | (assignment on the face of the patent) | / |
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