Granted Patent
Utility
US 5,178,949 · App. 07/703,784
Color-former
Inventors:
Masahiro Sakamoto, Tsutomu Murano, Shozo Harada
Patented Case
View Patent ↗
Granted: Jan 12, 1993
Filed: May 21, 1991
Inventors
Masahiro Sakamoto
Tsutomu Murano
Shozo Harada
Assignee (at issue)
Jujo 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.