Granted Patent
Utility
US 5,115,856 · App. 07/753,957
Core box with large diameter vents and plugs
Inventors:
Robert E. Downing, Bobby L. Wilson
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Sep 3, 1991
Inventors
Robert E. Downing
Bobby L. Wilson
Assignee (at issue)
Doehler-Jarvis Limited Partnership
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.