Granted Patent
Utility
US 4,909,592 · App. 07/250,897
Communication cable having water blocking provisions in core
Inventors:
Candido J. Arroyo, Paul F. Gagen
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Sep 29, 1988
Inventors
Candido J. Arroyo
Paul F. Gagen
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.