Mark Identification

STRENGTH IN NUMBERS

Serial Number

76474151

Filing Date

Dec 10, 2002

Registration Date

Oct 28, 2003

Trademark by

HOUGHTON MIFFLIN HARCOURT PUBLISHING COMPANY

Active Trademark

Classification Information

printed materials, namely, a series of educational books, study guides, worksheets and teaching manuals for elementary and secondary students in the field of mathematics

Paper Goods and Printed Matter