Granted Patent
Utility
US 6,397,449 · App. 09/580,419
Method for expansion forming of tubing
Inventors:
Murray R. Mason, Gerrald A. Klages
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: May 30, 2000
Inventors
Murray R. Mason
Gerrald A. Klages
Assignee (at issue)
VARI-FORM, 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.