Granted Patent
Utility
US 4,474,192 · App. 06/404,067
Cigarettes
Inventors:
Kenneth John Maclean, Michael J. Ward
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Aug 2, 1982
Inventors
Kenneth John Maclean
Michael J. Ward
Assignee (at issue)
Brown & Williamson Tobacco Corporation
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.