Granted Patent
Utility
US 4,721,137 · App. 06/916,332
Apparatus for withdrawing liquid from closed receptacle
Inventor:
Paul Muller
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Oct 7, 1986
Inventor
Paul Muller
Assignee (at issue)
Kontron Holding A.G.
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.