Granted Patent
Utility
US 6,368,041 · App. 09/669,553
Drum elevator system
Inventors:
Charles Gary Atwell, Ricky N. Cooper, Martin T. Garthaffner, Andrew Gillespie, Ronald D. Honaker, William H. Pettigrew, William H. Smick, III
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Sep 26, 2000
Inventors
Charles Gary Atwell
Ricky N. Cooper
Martin T. Garthaffner
Andrew Gillespie
Ronald D. Honaker
William H. Pettigrew
William H. Smick, III
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.