Granted Patent
Utility
US 6,409,876 · App. 09/065,622
Apparatus for etching a workpiece
Inventors:
Andrew Duncan McQuarrie, Lee Campbell Boman
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Apr 24, 1998
Inventors
Andrew Duncan McQuarrie
Lee Campbell Boman
Assignee (at issue)
Surface Technology Systems 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.