Granted Patent
Utility
US 6,474,171 · App. 09/528,980
Vacuum gauge
Inventors:
Alan E. Holme, Waleed Ahmed Qader
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Mar 21, 2000
Inventors
Alan E. Holme
Waleed Ahmed Qader
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.