Granted Patent
Utility
US 4,258,241 · App. 06/024,702
Slot furnace for inductively heating axially spaced areas of a workpiece
Inventor:
David R. Soworowski
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Mar 28, 1979
Inventor
David R. Soworowski
Assignee (at issue)
Park-Ohio Industries
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.