Granted Patent
Utility
US 5,709,021 · App. 08/241,109
Process for the manufacture of metal tubes
Inventors:
John A. DiCello, Bhupinder S. Minhas, Jeffrey W. Simpson, Rajendra S. Cornelius, John D. Harrison
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: May 11, 1994
Inventors
John A. DiCello
Bhupinder S. Minhas
Jeffrey W. Simpson
Rajendra S. Cornelius
John D. Harrison
Assignee (at issue)
MemRay Corporation
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.