Granted Patent
Utility
US 4,894,501 · App. 07/318,347
Method and apparatus for induction heating of gear teeth
Inventors:
George D. Pfaffmann, Norbert R. Balzer, George M. Mucha, Donald E. Novorsky
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Mar 2, 1989
Inventors
George D. Pfaffmann
Norbert R. Balzer
George M. Mucha
Donald E. Novorsky
Assignee (at issue)
Tocco, Inc.
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.