Granted Patent
Utility
US 4,589,182 · App. 06/673,732
Method and apparatus for forming a space section in a pair of continuous concealed-slide-fastener stringers
Inventor:
Shigeru Imai
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Nov 21, 1984
Inventor
Shigeru Imai
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.