Granted Patent
Utility
US 6,732,763 · App. 10/154,390
Stretch-resistant pipe liner
Inventors:
John S. Williamson, Jin Young Choi
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: May 24, 2002
Inventors
John S. Williamson
Jin Young Choi
Assignee (at issue)
Lantor, Inc.
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.