U.S. federal trademark · Serial No. 99146094
Printed educational publications, namely, educational learning cards, flash cards, activity cards, workbooks, textbooks, activity books, story books, puzzle books, printed puzzles, teacher guides, manuals, posters and educational booklets in the field of Printed puzzle books; logic-based puzzle books featuring symbolic Sudoku-style games; books containing non-numeric Sudoku puzzles using custom-drawn symbols; printed game books for mental skill and logic development; printed materials, namely, workbooks and activity books in the field of logic puzzles and recreational mathematics.
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.