Granted Patent
Utility
US 6,400,258 · App. 09/487,033
Electric arc monitoring systems
Inventor:
Michael Parker
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Jan 19, 2000
Inventor
Michael Parker
Assignee (at issue)
HENDRY MECHANICAL WORKS
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.