Granted Patent
Utility
US 5,865,187 · App. 08/793,353
Method and apparatus for expanding tobacco
Inventors:
E. Barry Fischer, Warren D. Winterson
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Apr 23, 1997
Inventors
E. Barry Fischer
Warren D. Winterson
Assignee (at issue)
Philip Morris Inc.
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.