Granted Patent
Utility
US 4,835,359 · App. 07/156,867
Method of manufacturing hemispherical tank heads
Inventor:
John Sciortino
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Feb 18, 1988
Inventor
John Sciortino
Assignee (at issue)
Commercial Shearing, Inc.
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.