73298312
Feb 23, 1981
May 17, 1983
Educational Materials-Namely, Pamphlets for Teaching Kindergarten Through Sixth Grade Children Principles Related to Light and Color Phenomena as Well as Certain Aspects of Human Perception
Paper Goods and Printed MatterEducational Services-Namely, Providing Specialized Activities and Programs for Preschool and Grammar School Children Designed to Illustrate Principles Related to Light and Color Phenomena, Certain Aspects of Human Perception, and Principles and Phenomena of Both the Physical and Natural Sciences
Education and Entertainment