Granted Patent
Utility
US 4,589,448 · App. 06/634,477
Flexible helically wound hose with hinged strip
Inventor:
Jorge Del Valle
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Jul 25, 1984
Inventor
Jorge Del Valle
Assignee (at issue)
Aktiebolaget Electrolux
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.