Granted Patent
Utility
US 4,402,192 · App. 06/336,144
Refrigerated display case having an accordion-type combined air duct and service door
Inventor:
James Robert Henry
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Dec 31, 1981
Inventor
James Robert Henry
Assignee (at issue)
Emhart Industries, 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.