Granted Patent
Utility
US 4,989,412 · App. 07/485,712
Method of manufacture of an automotive vehicle having an air conditioning system
Inventor:
Roger Laverne Johnson
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Feb 27, 1990
Inventor
Roger Laverne Johnson
Assignee (at issue)
Navistar International Transportation
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.