Granted Patent
Utility
US 4,422,220 · App. 06/351,745
Automatic lock slider for slide fasteners
Inventor:
Kiyoshi Oda
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Feb 24, 1982
Inventor
Kiyoshi Oda
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.