Granted Patent
Utility
US 4,267,621 · App. 06/080,703
Slide fastener
Inventor:
Shunji Akashi
Patented Case
View Patent ↗
Granted: May 19, 1981
Filed: Oct 1, 1979
Inventor
Shunji Akashi
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.