Granted Patent
Utility
US 5,625,857 · App. 08/369,216
Image forming apparatus which measures deposit amounts of toner
Inventors:
Akira Shimada, Toru Miyasaka, Nobuo Tokoro, Shin Sato
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Jan 5, 1995
Inventors
Akira Shimada
Toru Miyasaka
Nobuo Tokoro
Shin Sato
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.