Granted Patent
Utility
US 4,603,391 · App. 06/545,147
Feed-deviation preventive numerically controlled EDM method and apparatus
Inventors:
Kiyoshi Inoue, Akihiko Shimizu
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Oct 25, 1983
Inventors
Kiyoshi Inoue
Akihiko Shimizu
Assignee (at issue)
Inoue-Japax Research Incorporated and Japax Incorporated
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.