Granted Patent
Utility
US 6,386,550 · App. 09/496,584
Subterranean coupler
Inventors:
John Mokrzycki, Michael Alan Greer
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Feb 2, 2000
Inventors
John Mokrzycki
Michael Alan Greer
Assignee (at issue)
Stepcon Industries Inc.
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.