Granted Patent
Utility
US 4,524,493 · App. 06/498,519
Watertight slide fastener
Inventor:
Akio Inamura
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: May 26, 1983
Inventor
Akio Inamura
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.