Granted Patent
Utility
US 4,951,485 · App. 07/426,724
Dial lock device for slide fasteners
Inventor:
Kiyoyasu Wake
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Oct 26, 1989
Inventor
Kiyoyasu Wake
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.