Granted Patent
Utility
US 4,550,740 · App. 06/558,414
Mouthpiece for a cigarette and a cigarette having same
Inventor:
Tilford F. Riehl
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Dec 5, 1983
Inventor
Tilford F. Riehl
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.