Granted Patent
Utility
US 5,636,513 · App. 08/431,079
Two stage pressurization system for aerospace applications
Inventor:
Donald A. Pahl
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Apr 27, 1995
Inventor
Donald A. Pahl
Assignee (at issue)
Olin 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.