Granted Patent
Utility
US 6,253,595 · App. 09/400,560
Automated pipe bending machine
Inventor:
Donald E. Lewis
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Sep 21, 1999
Inventor
Donald E. Lewis
Assignee (at issue)
CRC-EVANS PIPELINE INTERNATIONAL, 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.