Granted Patent
Utility
US 4,894,890 · App. 07/253,552
Buckle assembly
Inventor:
Kazumi Kasai
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Oct 5, 1988
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.