Granted Patent
Utility
US 4,740,072 · App. 06/823,784
Vision testing apparatus
Inventors:
Jan P Griffin, Anthony G. Gates, Delroy K. Rinehart
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Jan 29, 1986
Inventors
Jan P Griffin
Anthony G. Gates
Delroy K. Rinehart
Assignee (at issue)
Titmus Optical, Inc.
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.