Granted Patent
Utility
US 6,434,776 · App. 09/763,378
Tube scraping device
Inventors:
Dominique Pfeiffer, Patrick Lecointe
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Feb 21, 2001
Inventors
Dominique Pfeiffer
Patrick Lecointe
Assignee (at issue)
Gaz de France-(GDF) Service National
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.