Granted Patent
Utility
US 6,441,856 · App. 09/665,087
Digital camera, having a flash unit, which determines proper flash duration through an assessment of image luminance and, where needed, a preliminary flash emission
Inventor:
Kazuhiko Sugimoto
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 20, 2000
Inventor
Kazuhiko Sugimoto
Assignee (at issue)
SANYO ELECTRIC 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.