Granted Patent
Utility
US 4,557,991 · App. 06/588,802
Toner for development of electrostatic image containing binder resin and wax
Inventors:
Hiroyuki Takagiwa, Jiro Takahashi, Meizo Shirose, Naomi Inaba, Megumi Seki
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Mar 12, 1984
Inventors
Hiroyuki Takagiwa
Jiro Takahashi
Meizo Shirose
Naomi Inaba
Megumi Seki
Assignee (at issue)
Konishiroku Photo Industry 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.