Granted Patent
Utility
US 4,418,259 · App. 06/294,932
Method and apparatus of uniform induction heating of an elongated workpiece
Inventor:
John C. Lewis, Jr.
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Aug 21, 1981
Inventor
John C. Lewis, Jr.
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.