Granted Patent
Utility
US 6,470,925 · App. 09/898,690
Vacuum system
Inventors:
Jouni Hyvarinen, Tommi Naski
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Jul 5, 2001
Inventors
Jouni Hyvarinen
Tommi Naski
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.