Granted Patent
Utility
US 4,877,704 · App. 07/191,790
Process for developing latent electrostatic image using toner containing polyester resin
Inventors:
Hiroyuki Takagiwa, Jiro Takahashi, Meizo Shirose, Kunio Akimoto, Masafumi Uchida
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Apr 28, 1988
Inventors
Hiroyuki Takagiwa
Jiro Takahashi
Meizo Shirose
Kunio Akimoto
Masafumi Uchida
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.