Granted Patent
Utility
US 5,178,378 · App. 07/809,251
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Inventor:
Yoshiaki Nakajima
Patented Case
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Granted: Jan 12, 1993
Filed: Dec 18, 1991
Inventor
Yoshiaki Nakajima
Assignee (at issue)
Chino Corporation
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.