Granted Patent
Utility
US 4,451,729 · App. 06/394,804
Automatic focusing device and lens motor control
Inventors:
Tadao Takagi, Nobuo Okabe
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Jul 2, 1982
Inventors
Tadao Takagi
Nobuo Okabe
Assignee (at issue)
Nippon Kogaku K.K.
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.