Granted Patent
Utility
US 4,855,592 · App. 07/228,537
Apparatus using optical fibers for inspecting slide fastener elements
Inventor:
Toyosaku Ogura
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Aug 5, 1988
Inventor
Toyosaku Ogura
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.