72153062
Sep 13, 1962
Sep 17, 1963
EDUCATIONAL DEVICES INCLUDING A DISPLAY SURFACE AND DISPLAY OBJECTS IN THE NATURE OF FLASH CARDS, CUT-OUTS OR THE LIKE ADAPTED TO BE RELEASABLY HELD BY SAID DISPLAY SURFACE AND USED BY TEACHERS IN ILLUSTRATING NUMERALS, LETTERS, WORDS, PROBLEMS AND OBJECTS FOR THE TRAINING OF YOUNG CHILDREN
Cordage and Fibers