Granted Patent
Utility
US 4,890,786 · App. 07/255,561
Fibre drum with reinforcement collar
Inventors:
Lanny A. Oberhofer, Donald E. Miller
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Oct 11, 1988
Inventors
Lanny A. Oberhofer
Donald E. Miller
Assignee (at issue)
Sonoco Products Company
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.