Granted Patent
Utility
US 4,896,940 · App. 07/309,897
Optical fiber cable for use in high temperature contaminating environment
Inventors:
Krishnaswamy Kathiresan, Parbhubhai D. Patel, Manuel R. Santana
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Feb 10, 1989
Inventors
Krishnaswamy Kathiresan
Parbhubhai D. Patel
Manuel R. Santana
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.