Granted Patent
Utility
US 6,748,973 · App. 10/122,597
Valve means
Inventor:
Gunnar Lindroos
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Apr 15, 2002
Inventor
Gunnar Lindroos
Assignee (at issue)
Evac International Oy
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.