U.S. federal trademark · Serial No. 73529782 · Reg. No. 1400958
TEACHING APPARATUS, NAMELY KITS CONTAINING STORAGE CASES AND MANIPULATIVE PIECES USED TO ILLUSTRATE MATHEMATICAL RELATIONSHIPS AND CONCEPTS, AND EDUCATIONAL DEMONSTRATION APPARATUS HAVING MOVING PARTS WHICH ILLUSTRATE TRIGONOMETRIC RELATIONSHIPS; AND EDUCATIONAL PRERECORDED VIDEO TAPES
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