Manufacturer: Mayer China
Date: It is not known when the "Design Patented" backstamp was used
Notes: Black art deco pattern on white body, also seen in blue (on a white or tan body) and red (blue on tan and red shown above), or brown.
The US Patent Design 83688 was issued to A.E. Mayer on March 17, 1931 for the Dalton pattern.
For related info: Rialto Grill for a topmarked Dalton pattern in brown on a tan body.