Granted Patent
Utility
US 4,704,772 · App. 06/924,972
Snap-fit clasp fastener for bags
Inventor:
Kazumi Kasai
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Oct 30, 1986
Inventor
Kazumi Kasai
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.