Granted Patent
Utility
US 5,573,387 · App. 08/349,697
Vacuum pumps
Inventor:
Alan Ernest Kinnaird Holbrook
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Dec 5, 1994
Inventor
Alan Ernest Kinnaird Holbrook
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.