Granted Patent
Utility
US 4,434,923 · App. 06/383,985
Apparatus for separating castings into necessary and unnecessary pieces
Inventors:
Kazuo Nagata, Susumu Ishii
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Jun 1, 1982
Inventors
Kazuo Nagata
Susumu Ishii
Assignee (at issue)
Yoshida Kogyo K.K.
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.