Granted Patent
Utility
US 6,470,693 · App. 09/903,200
Compressed air refrigeration system
Inventor:
James R. Dickey
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Jul 11, 2001
Inventor
James R. Dickey
Assignee (at issue)
Ingersoll-Rand Company
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.