Granted Patent
Utility
US 4,470,621 · App. 06/337,070
Flexible tubular connector
Inventor:
Joseph H. Irvine
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Jan 4, 1982
Inventor
Joseph H. Irvine
Assignee (at issue)
Hydril Company
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.