U.S. federal trademark · Serial No. 77084114 · Reg. No. 3333722
Instructional Devices Consisting of Printed Boards Associating Numbers With Color for Teaching Multiplication Skills and Number Relationships; Educational Kit for Instruction in Mathematics Consisting of Printed Cut-Out Sheets, Paper Supply and Instructions for Using the Same to Associate Numbers with Color; and Educational Kit for Instruction in Mathematics Consisting of a Plurality of Color-Coded Blocks and Instructions for Using the Same to Associate Numbers with Color
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