Granted Patent
Utility
US 4,258,792 · App. 06/020,811
Hydraulic tubing tensioner
Inventor:
Henry L. Restarick
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Mar 15, 1979
Inventor
Henry L. Restarick
Assignee (at issue)
Otis Engineering Corporation
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.