Trade-Mark registered United States Patent Office, The Eastern Color Printing Company.
Indexed with information from Ger Apeldoorn and Jim Vadeboncoeur, Jr. via the GCD Error Tracker and http://digitalcomicmuseum.com/.
On the inside front cover.
Everett credits from Apeldoorn and Vadeboncoeur, but disputed by Michael Vassallo.
Credits verified by Blake Bell in the Bill Everett Archives #2.
On the inside back cover.