U.S. federal trademark · Serial No. 75026983
pens; pencils; drawing rulers; books and flash cards both for learning and teaching mathematics at the pre-school through college level for use by students and teachers
prerecorded audio and video tapes, phonograph recordings, and compact discs all for use in learning and teaching mathematics at the pre-school through college level for use by students and teachers
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.