Patent
   D597590
Priority
Mar 09 2006
Filed
Jun 08 2006
Issued
Aug 04 2009
Expiry
Aug 04 2023
Assg.orig
Entity
unknown
0
12
n/a
The ornamental design for a self-correcting abacus, as shown and described.

FIG. 1 is a top plan view of a self-correcting abacus, showing my new design, with the vertical rods removed for ease of disclosure;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right side elevation view thereof, the left side being a mirror image thereof;

FIG. 5 is a top plan view thereof, shown with the vertical rods attached and with the drawer in an open position and the drawer compartment lids fully retracted;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a rear elevation view thereof;

FIG. 8 is a right side elevation view thereof with the drawer shown extended;

FIG. 9 is a perspective view thereof, with the drawer compartment lids partially retracted; and,

FIG. 10 is a cross-section view thereof, taken along line 1010 of FIG. 5, showing the slots which the compartment lids fit into when fully closed.

The broken lines depict environmental subject matter only and form no part of the claimed design.

Stone, Celia Anne

Patent Priority Assignee Title
Patent Priority Assignee Title
2252678,
2494497,
3321133,
4629431, Oct 24 1985 Game for teaching time concepts
5134692, May 23 1989 Hiromori Inc. Combined electronic calculator and abacus with deflective guide bars
5205747, May 13 1992 Bead calculator educational toy
6712614, Feb 07 2001 Abacus calculator
20030148250,
165550,
D249090, Mar 18 1976 Hewlett-Packard Company Casing for an electronic calculator
D309165, Oct 31 1986 Kinderworks Corporation Children's toy
D513762, Feb 27 2004 Abacus
//
Executed onAssignorAssigneeConveyanceFrameReelDoc
May 04 2006STONE, CELIA ANNEAddacus LimitedASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0177490436 pdf
Jun 08 2006Addacus Limited(assignment on the face of the patent)
n/a
Date Maintenance Fee Events


n/a
Date Maintenance Schedule