Granted Patent
Utility
US 4,747,421 · App. 06/881,073
Apparatus for removing covering film
Inventor:
Chikara Hayashi
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Jul 2, 1986
Inventor
Chikara Hayashi
Assignees (at issue)
Research Development Corporation of Japan
Vacuum Metallurgical Co., 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.