The following page comes from a 1939 Marshall-Wells Company catalog. The top two pots on the left were made by Porcelier. The example on the far right in the box was made by Cameron Clay Products and was part of their Sevilla line.
the Dripolators in the middle were made by Hall China with patterns D.2018 on the left and D.1954 on the right. The six teapots in the bottom left hand corner were also made by Hall. With the gold trim, these six were "Group 3" in Hall catalogs.