Granted Patent
Utility
US 4,493,173 · App. 06/227,799
Automatic cable passage closure and sealing device
Inventor:
John E. Kohaut
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Jan 23, 1981
Inventor
John E. Kohaut
Assignee (at issue)
Raceway Components, Inc.
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.