Granted Patent
Utility
US 5,228,727 · App. 07/864,195
Tubular body having pipe joint member attached thereto and method of producing same
Inventors:
Toshinori Tokutake, Hirosaburo Hirano
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Apr 3, 1992
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.