Granted Patent
Utility
US 5,458,470 · App. 08/144,088
Pumping apparatus
Inventors:
Othmar Mannhart, Otto Tschumi
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Oct 27, 1993
Inventors
Othmar Mannhart
Otto Tschumi
Assignee (at issue)
Sandoz AG
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.