Granted Patent
Utility
US 4,688,728 · App. 06/770,503
Apparatus for adapting revolving beater/whipper unit to food processor working bowls of various diameters
Inventor:
James E. Williams
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Aug 28, 1985
Inventor
James E. Williams
Assignee (at issue)
Cuisinarts, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.