Granted Patent
Utility
US 4,855,556 · App. 07/184,588
Method and apparatus for hardening gears and similar workpieces
Inventors:
George M. Mucha, Donald E. Novorsky, George D. Pfaffmann
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Jun 21, 1988
Inventors
George M. Mucha
Donald E. Novorsky
George D. Pfaffmann
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.