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Patent
   D284975
Priority
Aug 07 1984
Filed
Aug 07 1984
Issued
Aug 05 1986
Expiry
Aug 05 2000
Inventors
Kwok, Herb…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
6
References
5
Maint.:
n/a
The ornamental design for combined desktop abacus and electronic calculator, as shown and described.

FIG. 1 is a top plan view of a combined desktop abacus and electronic calculator showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a left side elevational view, the right side being a mirror image; and

FIG. 4 is a front elevational view.
INVENTORS:

Kwok, Herbert

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
6712614, Feb 07 2001 Abacus calculator
D399522, Nov 26 1996 Digital abacus
D615547, Jan 22 2009 DREAMBOX LEARNING INC User interface for a computer display
D615988, Jan 22 2009 DREAMBOX LEARNING INC User interface for a computer display
D629809, Jan 22 2009 DREAMBOX LEARNING INC User interface for a computer display
D797847, Mar 16 2016 Abacus
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
3688418,
CH86872,
D271025, Jul 19 1982 RJP Electronics Limited Combined ruler and electronic calculator
FR1094208,
JP132847,
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