Granted Patent
Utility
US 4,829,638 · App. 07/134,750
Automatically locking slider
Inventor:
Susumu Ishii
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Dec 18, 1987
Inventor
Susumu Ishii
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.