Granted Patent
Utility
US 5,838,589 · App. 08/650,458
Intrinsically safe data acquisition system and apparatus
Inventors:
George Michael Nail, Alan Wayne Burkhard, Jeffrey R. Wedekind
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: May 20, 1996
Inventors
George Michael Nail
Alan Wayne Burkhard
Jeffrey R. Wedekind
Assignee (at issue)
M-I L.L.C.
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.