A. BALLA & CO. Trademarks
CM CUBES
Filed: July 23, 1975
PLURALITY OF CUBES WHICH MAY BE MANUALLY ASSEMBLED INTO VARIOUS EDUCATIONAL MODELS
Owned by: A. BALLA & CO.
Serial Number: 73058523
EASY METHOD
Filed: October 30, 1975
RULERS FOR METRIC CONVERSION
Owned by: A. BALLA & CO.
Serial Number: 73067517
