Granted Patent
Utility
US 4,636,183 · App. 06/639,759
Apparatus for making grooves in cigarette filters
Inventors:
John H. Sexstone, Everett N. Finn, Byron L. Lowe, Ken Milliner
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Aug 13, 1984
Inventors
John H. Sexstone
Everett N. Finn
Byron L. Lowe
Ken Milliner
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.