Granted Patent
Utility
US 4,477,244 · App. 06/562,957
Torch
Inventors:
John R. Nis, Carroll D. Spainhour
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Dec 19, 1983
Inventors
John R. Nis
Carroll D. Spainhour
Assignee (at issue)
AT&T Technologies Incorporated
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.