Granted Patent
Utility
US 5,482,406 · App. 08/047,810
Variable spring rate compression element and riser tensioner system using the same
Inventor:
Edward J. Arlt
Patented Case
View Patent ↗
Granted: Jan 9, 1996
Filed: Apr 15, 1993
Inventor
Edward J. Arlt
Assignee (at issue)
Continental Emsco 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.