Granted Patent
Utility
US 4,589,317 · App. 06/567,375
Sheet or plate material machining equipment
Inventor:
Susumu Kawano
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Dec 30, 1983
Inventor
Susumu Kawano
Assignee (at issue)
U.S. Amada Ltd.
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.