Granted Patent
Utility
US 6,453,539 · App. 09/548,108
Metal tube coupling arrangement and method of manufacture
Inventor:
Donald Howard Brugmann, Jr.
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Apr 12, 2000
Inventor
Donald Howard Brugmann, Jr.
Assignee (at issue)
DANA LIMITED
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.