Granted Patent
Utility
US 4,968,554 · App. 07/259,682
Support sheet for photographic paper
Inventors:
Tsunehisa Shigetani, Masahiro Yamana, Takao Ayukawa, Masahiro Kamiya, Tetsu Uesaka
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Oct 19, 1988
Inventors
Tsunehisa Shigetani
Masahiro Yamana
Takao Ayukawa
Masahiro Kamiya
Tetsu Uesaka
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.