Granted Patent
Utility
US 4,811,468 · App. 07/125,177
Hook element for surface fasteners
Inventor:
Yasuo Yamada
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Nov 25, 1987
Inventor
Yasuo Yamada
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.