Granted Patent
Utility
US 4,782,239 · App. 06/846,950
Optical position measuring apparatus
Inventors:
Hideo Hirose, Tomohide Hamada
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Apr 1, 1986
Inventors
Hideo Hirose
Tomohide Hamada
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.