Granted Patent
Utility
US 6,283,815 · App. 09/351,001
Electron source and image forming apparatus as well as method of providing the same with means for maintaining activated state thereof
Inventors:
Tatsuya Iwasaki, Toshikazu Ohnishi
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Jul 12, 1999
Inventors
Tatsuya Iwasaki
Toshikazu Ohnishi
Assignee (at issue)
CANON 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.