Granted Patent
Utility
US 4,533,378 · App. 06/383,066
Modified zirconia induction furnace
Inventors:
Un-Chul Paek, Charles M. Schroeder
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: May 28, 1982
Inventors
Un-Chul Paek
Charles M. Schroeder
Assignee (at issue)
AT&T Technologies Incorporated
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.