Granted Patent
Utility
US 5,160,219 · App. 07/641,541
Variable spring rate riser tensioner system
Inventor:
Edward J. Arlt
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Jan 15, 1991
Inventor
Edward J. Arlt
Assignee (at issue)
LTV Energy Products Co.
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.