Granted Patent
Utility
US 6,792,641 · App. 09/600,902
Pipeline pig
Inventor:
Keith Laker
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Jul 24, 2000
Inventor
Keith Laker
Assignee (at issue)
Hamdeen Incorporated Limited
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.