Granted Patent
Utility
US 5,855,053 · App. 08/664,727
Method and forming die for fabricating spiral groove torque tube assemblies
Inventor:
Aldo Arena
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Jun 18, 1996
Inventor
Aldo Arena
Assignee (at issue)
NORTHROP GRUMMAN 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.