Granted Patent
Utility
US 4,401,485 · App. 06/285,788
Method for inductively heating thin-walled elongated workpieces
Inventor:
Donald E. Novorsky
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Jul 22, 1981
Inventor
Donald E. Novorsky
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.