Granted Patent
Utility
US 6,598,286 · App. 10/222,460
Metal tube coupling arrangement and method of manufacture
Inventor:
Donald Howard Brugmann, Jr.
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Aug 16, 2002
Inventor
Donald Howard Brugmann, Jr.
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.