Granted Patent
Utility
US 4,421,947 · App. 06/229,151
Polycrystalline insulating material seals between spaced members such as a terminal pin and a ferrule
Inventor:
James C. Kyle
Patented Case
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Granted: Dec 20, 1983
Filed: Jan 28, 1981
Inventor
James C. Kyle
Assignee (at issue)
James C. Kyle
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.