Granted Patent
Utility
US 4,319,940 · App. 06/235,362
Methods of making cable having superior resistance to flame spread and smoke evolution
Inventors:
Candido J. Arroyo, Nicholas J. Cogelia, Ralph J. Darsey
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Feb 17, 1981
Inventors
Candido J. Arroyo
Nicholas J. Cogelia
Ralph J. Darsey
Assignees (at issue)
Bell Telephone Laboratories, Inc.
Western Electric Company, 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.