Granted Patent
Utility
US 6,381,972 · App. 09/868,670
Multiple zone refrigeration
Inventor:
Dennis Cotter
Patented Case
View Patent ↗
Granted: May 7, 2002
Filed: Jun 19, 2001
Inventor
Dennis Cotter
Assignee (at issue)
Hussmann Corporation
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.