Granted Patent
Utility
US 5,317,607 · App. 08/054,269
EDM crack removal tooling
Inventor:
Frank J. Formanek
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: Apr 30, 1993
Inventor
Frank J. Formanek
Assignee (at issue)
Combustion Engineering, 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.