Granted Patent
Utility
US 5,621,504 · App. 08/350,565
Toner transferring device
Inventors:
Kazuhiro Wakamatsu, Akira Sasaki, Nobuaki Fukasawa
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Dec 7, 1994
Inventors
Kazuhiro Wakamatsu
Akira Sasaki
Nobuaki Fukasawa
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.