Granted Patent
Utility
US 4,530,639 · App. 06/577,359
Dual-entry centrifugal compressor
Inventor:
Rolf J. Mowill
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Feb 6, 1984
Inventor
Rolf J. Mowill
Assignee (at issue)
A/S Kongsberg Vapenfabrikk
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.