Granted Patent
Utility
US 4,492,393 · App. 06/297,574
Pipe restraint device
Inventor:
Erwin L. Schaub
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Aug 31, 1981
Inventor
Erwin L. Schaub
Assignee (at issue)
Parker-Hannifin 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.