Below you'll find an extract of text on an article written about the pottery of the Pennsylvania Germans. It is intended for education purposes for descendants of the Drachs.

... The German potters of the eighteenth century, particularly throughout the Rhenish Palitinate, used the tulip extensively as a decorative subject on their slip-ornamented eathenware. ... When the emigrants from Germany settled in eastern Pennsylvania in the last century, they brought with them the ancient art of slip-decoration and first established it in the United States." Source: Tulip Ware of the Pennsylvania-German Potters by Edwin Atlee Barber, Pub 1903

One of those named and dated pieces, shown here, contained an inscription identifying the piece as having been created by Rudolph Drach, potter, in Bedminster Township (Bucks County), Pa in the year 1792.

Later in the article it states, "In 1763 Thomas and John Penn conveyed three hundred acres in Bedminster to Rudolf Trach", a sometimes used spelling of the Drach surname. At Rufolph's death,"in 1770, this land was divided between his two sons, Henry and Adam. In 1787 Henry conveyed his share of the land to his son Rudolph", who was, no doubt, the maker of the dish.

On the Art Institute of Chicago's website you can see a page referring to a plate produced by Rudolf Drach in 1792. You can view the page by clicking HERE.