Granted Patent
Utility
US 4,787,282 · App. 07/080,935
Method and apparatus for forming by punching
Inventors:
Kenji Okachi, Sadaharu Ishihara
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Aug 3, 1987
Inventors
Kenji Okachi
Sadaharu Ishihara
Assignee (at issue)
Warner & Swasey
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.