Granted Patent
Utility
US 4,490,889 · App. 06/363,494
Slide fastener assembly
Inventor:
Hiroshi Yoshida
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Mar 30, 1982
Inventor
Hiroshi Yoshida
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.