Granted Patent
Utility
US 5,824,263 · App. 08/589,709
Ladle brick leveling set
Inventors:
Edward L. Erny, William J. Winters
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Jan 22, 1996
Inventors
Edward L. Erny
William J. Winters
Assignee (at issue)
Harbison-Walker Refractories 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.