Consolidated Wafer

Recent internet searches turned up some tantalizing information about great-grandpa Morris Duberstein's business, the Consolidated Wafer Co. An early manufacturer of ice-cream cones, the business was in Brooklyn, but apparently had offices or manufacturing facilities in Chicago, San Francisco and elsewhere. 

It appears that Consolidated Wafer was merged in the mid-1920s with several other ice-cream cone manufacturers, and that merged entity was sold to Nabisco in 1928, a year after Morris died in Brooklyn.