Granted Patent
Utility
US 4,245,943 · App. 06/025,781
Unloading apparatus for vacuum electric furnaces
Inventor:
William J. Metalsky
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Apr 2, 1979
Inventor
William J. Metalsky
Assignee (at issue)
Abar Corporation
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.