Addresses in 1946:
Publication: 1117 Wolfendale St., Pittsburgh, Pa.
Editorial, Executive and Advertising: 1869 Broadway, New York 23, N. Y.
Some sources (including Keltner) list Family Comics, Inc. as the publisher of the final issue of Speed Comics in 1947. However, scans show that that issue does not have an indicia on the inside front cover or anywhere else, leaving the official publisher ambiguous. However, Harvey Publications, Inc., which took over Green Hornet from Family Comics, Inc. at the same time with a similar gap between issues, seems like a more likely guess.
It is still possible, though, that Family Comics, Inc. was used in 1947 as the indicia publishers of All New Comics #14-15 have not been confirmed. However, it seems reasonable that they would match Speed Comics #44 and the contemporary issues of Green Hornet Comics.