Granted Patent
Utility
US 4,944,988 · App. 07/291,032
Ink jet recording sheet and process for producing same
Inventors:
Kenji Yasuda, Akira Kobayashi, Makiko Tokita, Masao Maekawa, Masahiko Kitajima, Hisao Maruyama
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Dec 28, 1988
Inventors
Kenji Yasuda
Akira Kobayashi
Makiko Tokita
Masao Maekawa
Masahiko Kitajima
Hisao Maruyama
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.