Granted Patent
Utility
US 5,979,742 · App. 09/047,009
Friction agitation joining method for joining metallic joining members
Inventors:
Masatoshi Enomoto, Seiji Tasaki, Naoki Nishikawa, Ichiro Iwai, Takenori Hashimoto
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Mar 24, 1998
Inventors
Masatoshi Enomoto
Seiji Tasaki
Naoki Nishikawa
Ichiro Iwai
Takenori Hashimoto
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.