Granted Patent
Utility
US 6,553,206 · App. 09/996,993
Image forming apparatus
Inventors:
Kenji Asuwa, Kazutaka Sato, Shigeru Obata, Yasushi Kinoshita, Akitomo Kuwabara, Tetsuya Ooba
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Nov 30, 2001
Inventors
Kenji Asuwa
Kazutaka Sato
Shigeru Obata
Yasushi Kinoshita
Akitomo Kuwabara
Tetsuya Ooba
Assignees (at issue)
HITACHI, LTD.
Hitachi Printing Solutions, 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.