Granted Patent
Utility
US 4,900,620 · App. 07/254,081
Ink jet recording sheet
Inventors:
Makiko Tokita, Masahiro Nakagawa, Akira Kobayashi, Kenji Yasuda
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Oct 6, 1988
Inventors
Makiko Tokita
Masahiro Nakagawa
Akira Kobayashi
Kenji Yasuda
Assignee (at issue)
Oji Paper Co., Ltd.
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.