Granted Patent
Utility
US 4,693,952 · App. 06/736,705
Toner for developing electrostatic latent image
Inventors:
Fumio Koizumi, Takahira Kasuya, Jiro Takahashi
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: May 22, 1985
Inventors
Fumio Koizumi
Takahira Kasuya
Jiro Takahashi
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.