Granted Patent
Utility
US 4,893,638 · App. 07/281,599
Cigarette
Inventor:
John H. Lauterbach
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Dec 9, 1988
Inventor
John H. Lauterbach
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.