Granted Patent
Utility
US 6,209,639 · App. 09/534,601
Method of ensuring that well tubing was properly stretched
Inventor:
Frederic M. Newman
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Mar 27, 2000
Inventor
Frederic M. Newman
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.