Granted Patent
Utility
US 6,072,957 · App. 09/204,269
Flash unit for a camera
Inventor:
Yoshinobu Shibayama
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Dec 3, 1998
Inventor
Yoshinobu Shibayama
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.