Granted Patent
Utility
US 4,523,872 · App. 06/292,252
Torsion resistant grooved joint
Inventors:
Aldo Arena, Robert L. Benoit
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Aug 12, 1981
Inventors
Aldo Arena
Robert L. Benoit
Assignee (at issue)
Grumman Aerospace 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.