Granted Patent
Utility
US 5,280,971 · App. 08/056,397
Tubular body having pipe joint member attached thereto with brazing ring
Inventors:
Toshinori Tokutake, Hirosaburo Hirano
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: May 4, 1993
Inventors
Toshinori Tokutake
Hirosaburo Hirano
Assignee (at issue)
Showa Aluminum Corp.
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.