Granted Patent
Utility
US 4,226,448 · App. 06/003,990
Heat-recoverable metallic couplings
Inventor:
Harry C. Broyles
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Jan 16, 1979
Inventor
Harry C. Broyles
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.