Granted Patent
Utility
US 4,068,868 · App. 05/609,584
Flexible joints for marine risers
Inventor:
Juergen H. Ohrt
Patented Case
View Patent ↗
Granted: Jan 17, 1978
Filed: Sep 2, 1975
Inventor
Juergen H. Ohrt
Assignee (at issue)
Vetco Offshore Industries, Inc.
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.