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Patent
   D258451
Priority
Apr 14 1978
Filed
Oct 13 1978
Issued
Mar 03 1981
Expiry
Mar 03 1995
Inventors
Bellini, M…
Assg.orig
Ing. C. Ol…
Assg.curr
Ing. C. Ol…
Entity
unknown
Referenced by
2
References
3
Maint.:
n/a
The ornamental design for a portable calculator, substantially as shown and described.

FIG. 1 is a perspective view taken from the front, top and right of a portable calculator showing my new design;

FIG. 2 is a perspective view taken from rear, top and left thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof.
INVENTORS:

Bellini, Mario

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D339537, Apr 09 1991 Apple Inc Portable diagnostic test apparatus
D382590, Sep 01 1995 Thomas & Betts International, Inc Wire marker printer
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
218485,
228784,
237216,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Oct 13 1978Ing. C. Olivetti & C., S.p.A.(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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