Granted Patent
Utility
US 6,789,619 · App. 10/154,435
Apparatus and method for detecting the launch of a device in oilfield applications
Inventors:
Bradley T. Carlson, Ronnie D. Hughes
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: May 22, 2002
Inventors
Bradley T. Carlson
Ronnie D. Hughes
Assignee (at issue)
BJ 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.