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Patent
   D243191
Priority
Jan 15 1975
Filed
Jun 25 1975
Issued
Jan 25 1977
Expiry
Jan 25 1991
Inventors
Pemberton,…
Assg.orig
Sinclair R…
Assg.curr
Sinclair R…
Entity
unknown
Referenced by
9
References
2
Maint.:
n/a
The ornamental design for a calculator, as shown and described.

FIG. 1 is a front perspective view of a calculator showing my new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a left side elevational view, thereof and

FIG. 4 is a front elevational view thereof.
INVENTORS:

Pemberton, John Hunter

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D266854, Feb 08 1980 Canon Kabushiki Kaisha Desk-top electronic calculator
D281854, Dec 13 1982 CONSOLIDATED DEVICES, INC , 19220 SAN JOSE AVENUE, CITY OF INDUSTRY, CALIFORNIA, 91748, A CORP OF CA Force selector and readout unit for torque tools
D349501, May 11 1993 COMRISE ELECTRONICS CO , LTD Calling party identifying apparatus
D349502, May 11 1993 COMRISE ELECTRONICS CO , LTD Calling party identifying apparatus
D450677, Nov 21 2000 Conair Corporation Caller ID speaker telephone
D806784, Apr 25 2016 Casio Keisanki Kabushiki Kaisha Electronic calculator with printer
D836711, Sep 12 2016 Sharp Kabushiki Kaisha Electronic calculator
D857091, Sep 12 2016 Sharp Kabushiki Kaisha Electronic calculator
D943661, May 23 2019 HAREX INFOTECH INC Electronic calculator
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
226858,
236485,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 25 1975Sinclair Radionics Limited(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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