Granted Patent
Utility
US 4,941,955 · App. 07/305,456
Apparatus and method for electrochemical machining of flat plates or sheets
Inventor:
John E. Schuster
Patented Case
View Patent ↗
Granted: Jul 17, 1990
Filed: Feb 1, 1989
Inventor
John E. Schuster
Assignee (at issue)
The Interlake Companies, 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.