Granted Patent
Utility
US 4,402,777 · App. 06/287,669
Sleeve and covering for tubing
Inventor:
Rodney L. Derbyshire
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Jul 28, 1981
Inventor
Rodney L. Derbyshire
Assignee (at issue)
Radiation Dynamics, 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.