Granted Patent
Utility
US 4,529,280 · App. 06/383,288
Apparatus for subjectively measuring the refractive power of an eye
Inventor:
Masao Nohda
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: May 28, 1982
Inventor
Masao Nohda
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.