Granted Patent
Utility
US 4,723,845 · App. 06/911,464
Optical apparatus for the detection of position
Inventors:
Hideo Mizutani, Yutaka Suenaga
Patented Case
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Granted: Feb 9, 1988
Filed: Sep 25, 1986
Inventors
Hideo Mizutani
Yutaka Suenaga
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.