FIRST USE AT LEAST AS EARLY AS 1950, IN COMMERCE AT LEAST AS EARLY AS 1950, AT LEAST AS EARLY AS 1923, IN A D IFFERENT FORM.
FIRST USE AT LEAST AS EARLY AS 1950, IN COMMERCE AT LEAST AS EARLY AS 1950, AT LEAST AS EARLY AS 1923, IN A D IFFERENT FORM.
THE LETTERS ON THE DRAWING ARE NOTED TO REPRESENT THE REEK LETTERS CHI AND EPSILON.
CHI EPSILON