Granted Patent
Utility
US 4,785,641 · App. 07/086,854
Drain valve control for ice cube machine
Inventor:
Gregory McDougal
Patented Case
View Patent ↗
Granted: Nov 22, 1988
Filed: Aug 19, 1987
Inventor
Gregory McDougal
Assignee (at issue)
The Manitowoc Company, 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.