Granted Patent
Utility
US 6,527,064 · App. 09/673,320
Assembly for drill pipes
Inventor:
Jorgen Hallundbaek
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Nov 30, 2000
Inventor
Jorgen Hallundbaek
Assignee (at issue)
Welltec Aps
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.