Granted Patent
Utility
US 6,647,213 · App. 09/998,062
Image forming apparatus having a mode in which a process unit may be replaced
Inventor:
Kazuhisa Takeda
Patented Case
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Granted: Nov 11, 2003
Filed: Nov 30, 2001
Inventor
Kazuhisa Takeda
Assignees (at issue)
Kabushiki Kaisha Toshiba
TOSHIBA TEC KABUSHIKI KAISHA
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.