Granted Patent
Utility
US 4,920,650 · App. 07/315,727
Tension arrangement
Inventor:
Dag Edlund
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Feb 24, 1989
Inventor
Dag Edlund
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.