Mark Identification

ASTROVISION

Serial Number

74159643

Filing Date

Apr 22, 1991

Registration Date

Apr 27, 1993

Trademark by

HOUGHTON MIFFLIN COMPANY

Classification Information

multimedia, inquiry-based, interactive videodisc/computer software science program covering earth science

Electrical and Scientific Apparatus

printed manuals in the field of earth science for user, student and teacher

Paper Goods and Printed Matter