Granted Patent
Utility
US 5,416,951 · App. 08/170,793
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Inventors:
Keiichi Keyaki, Kideyuki Matsushima, Hitomi Kawamura
Patented Case
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Granted: May 23, 1995
Filed: Dec 21, 1993
Inventors
Keiichi Keyaki
Kideyuki Matsushima
Hitomi Kawamura
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.