Granted Patent
Utility
US 5,274,207 · App. 07/743,512
Induction heater
Inventor:
John T. Griffith
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Aug 12, 1991
Inventor
John T. Griffith
Assignee (at issue)
Electricity Association Technology Limited
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.