Granted Patent
Utility
US 4,836,640 · App. 06/879,703
Depressed cladding optical fiber cable
Inventors:
Charles H. Gartside, III, Paul Glodis, Parbhubhai D. Patel
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Jun 27, 1986
Inventors
Charles H. Gartside, III
Paul Glodis
Parbhubhai D. Patel
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.