Granted Patent
Utility
US 5,010,628 · App. 07/506,247
Coupling element row for slide fastener and surface treating method for the same
Inventor:
Hiroshi Yamagata
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Apr 9, 1990
Inventor
Hiroshi Yamagata
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.