Granted Patent
Utility
US 5,893,004 · App. 08/025,147
Developing unit
Inventor:
Takenori Yamamura
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Feb 18, 1998
Inventor
Takenori Yamamura
Assignee (at issue)
NEC CORPORATION
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.