Granted Patent
Utility
US 4,425,683 · App. 06/311,429
Separable slide fastener
Inventor:
Masahiko Hata
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Oct 14, 1981
Inventor
Masahiko Hata
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.