Granted Patent
Utility
US 5,657,568 · App. 08/573,693
Composite/metallic gun barrel having a differing, restrictive coefficient of thermal expansion
Inventor:
Roland J. Christensen
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Dec 18, 1995
Inventor
Roland J. Christensen
Assignee (at issue)
Roland J. Christensen
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.