Granted Patent
Utility
US 6,728,638 · App. 09/838,857
Method of monitoring operations of multiple service vehicles at a well site
Inventor:
Frederic M. Newman
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Apr 23, 2001
Inventor
Frederic M. Newman
Assignee (at issue)
KEY ENERGY SERVICES, LLC
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.