Granted Patent
Utility
US 6,237,635 · App. 09/579,751
Exhauster pressure control system
Inventor:
Masahiro Nambu
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: May 26, 2000
Inventor
Masahiro Nambu
Assignee (at issue)
Aera Japan Ltd.
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.