Granted Patent
Utility
US 4,299,413 · App. 06/052,228
Pipe coupling
Inventor:
Martin D. Neher
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Jun 26, 1979
Inventor
Martin D. Neher
Assignee (at issue)
Ciba-Geigy
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.