Granted Patent
Utility
US 5,222,304 · App. 07/635,585
Probes
Inventor:
Clive Butler
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Feb 6, 1991
Inventor
Clive Butler
Assignee (at issue)
British Technology Group Limited
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.