Granted Patent
Utility
US 5,346,878 · App. 08/108,500
Recording material
Inventors:
Masakatsu Nakatsuka, Naomasa Koike, Akinori Okada
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Aug 18, 1993
Inventors
Masakatsu Nakatsuka
Naomasa Koike
Akinori Okada
Assignees (at issue)
Mitsui Toatsu Chemicals, Incorporated
MITSUBISHI PAPER MILLS LIMITED
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.