Granted Patent
Utility
US 4,379,575 · App. 06/263,993
Composite coupling
Inventor:
Charles L. Martin
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: May 15, 1981
Inventor
Charles L. Martin
Assignee (at issue)
Raychem Limited
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.