PTO Wrapper PDF
Dossier Espace Google
Patent
   D471235
Priority
Jun 21 2001
Filed
Jun 21 2001
Issued
Mar 04 2003
Expiry
Mar 04 2017
Inventors
Emerson, K…
Assg.orig
Evan McKen…
Assg.curr
Evan McKen…
Entity
unknown
Referenced by
2
References
5
Maint.:
n/a
The ornamental design for mathematical instructional aide device, as shown and described.

FIG. 1 is a front, top respective view of a mathematical instruction aide device showing the new design;

FIG. 2 is a reduced top plan view thereof;

FIG. 3 is a reduced front elevational view thereof; and,

FIG. 4 is a reduced left side elevational view thereof.
INVENTORS:

Emerson, Kay Perkins

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D537119, Oct 14 2005 School Specialty, LLC Training device
D817409, May 05 2016 Beverage pong game board
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
3624928,
4360347, Dec 31 1980 Mathematical educational game devices
5827067, Apr 21 1997 Method and apparatus for educating mathematical functions
D392674, Apr 21 1997 Arithmetic instructional apparatus
D395675, Apr 21 1997 INOXCROM, S A Arithmetic instructional apparatus
ASSIGNMENT RECORDS    Assignment records on the USPTO
//
Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 21 2001Evan McKenna Foundation(assignment on the face of the patent)
Jun 21 2001EMERSON, KAY PERKINSEvan McKenna FoundationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0119280613 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
n/a
Date Maintenance Fee Events


n/a
Date Maintenance Schedule