Granted Patent
Utility
US 6,253,849 · App. 09/534,599
Method of distinguishing the raising and lowering of tubing and sucker rods
Inventor:
Frederic M. Newman
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Mar 27, 2000
Inventor
Frederic M. Newman
Assignee (at issue)
Newman Family Partnership, Ltd.
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.