Granted Patent
Utility
US 5,055,017 · App. 07/425,650
Mechanical pumps
Inventor:
Henryk Wycliffe
Patented Case
View Patent ↗
Granted: Oct 8, 1991
Filed: Oct 23, 1989
Inventor
Henryk Wycliffe
Assignee (at issue)
The BOC Group plc
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.