Granted Patent
Utility
US 6,488,028 · App. 09/051,092
Device for recovering anaesthetic
Inventor:
Hans Lambert
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Apr 14, 1998
Inventor
Hans Lambert
Assignee (at issue)
Hudson RCI AB
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.