Granted Patent
Utility
US 4,575,210 · App. 06/692,682
Automatic focusing device
Inventors:
Masashi Yamada, Kenichi Iwaida
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Jan 18, 1985
Inventors
Masashi Yamada
Kenichi Iwaida
Assignee (at issue)
Konishiroku Photo Industry 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.