Granted Patent
Utility
US 5,725,504 · App. 08/780,778
Spinal epidural needle assemblies
Inventor:
Michael Collins
Patented Case
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Granted: Mar 10, 1998
Filed: Jan 9, 1997
Inventor
Michael Collins
Assignee (at issue)
Smiths Industries Public Limited Company
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.