Granted Patent
Utility
US 4,924,252 · App. 07/330,288
Electronic flash device for camera
Inventors:
Yoshikazu Iida, Nobuyoshi Hagiuda, Norikazu Yokonuma, Hiroshi Sakamoto, Hideki Matsui
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Mar 29, 1989
Inventors
Yoshikazu Iida
Nobuyoshi Hagiuda
Norikazu Yokonuma
Hiroshi Sakamoto
Hideki Matsui
Assignee (at issue)
NIKON CORPORATION
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.