Granted Patent
Utility
US 6,569,588 · App. 09/791,554
Electrophotographic toner, production method thereof and electrophotographic image forming system
Inventors:
Akiko Oikawa, Akira Shimada, Toru Miyasaka, Masahiko Saito
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Feb 26, 2001
Inventors
Akiko Oikawa
Akira Shimada
Toru Miyasaka
Masahiko Saito
Assignee (at issue)
HITACHI, 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.