Granted Patent
Utility
US 4,771,522 · App. 07/110,860
Apparatus for manufacturing slide fasteners
Inventor:
Tatsuo Osaki
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Oct 21, 1987
Inventor
Tatsuo Osaki
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.