Granted Patent
Utility
US 4,619,087 · App. 06/729,495
Barrier-embedded pipe-coupling apparatus and method
Inventor:
Gerold J. Harbeke
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: May 1, 1985
Inventor
Gerold J. Harbeke
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.