Granted Patent
Utility
US 6,701,598 · App. 10/125,947
Joining and forming of tubular members
Inventors:
Chih-Chang Chen, Chi-Mou Ni, Peter A. Tropper, Daniel C. Hutchinson
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Apr 19, 2002
Inventors
Chih-Chang Chen
Chi-Mou Ni
Peter A. Tropper
Daniel C. Hutchinson
Assignee (at issue)
General Motors LLC
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.