On June 28, Frank L. Ogg received U.S. Patent No. D110257 on a Pennant Like Device:

As has been posted here many times, the patent collection is a fascinating historical record. The Golden Gate International Exposition was a World’s Fair held at Treasure Island in San Francisco, California. It operated from February 18, 1939, through October 29, 1939, and from May 25, 1940, through September 29, 1940, and drew 17 million visitors.

On the opposite side of the country, New York was holding a world’s fair, and here is the patent on the parachute drop amusement ride at the fair: