Granted Patent
Utility
US 6,507,715 · App. 09/899,077
Image forming apparatus having developing supporters
Inventor:
Hisao Okada
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Jul 6, 2001
Inventor
Hisao Okada
Assignee (at issue)
Hitachi Koki 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.