Granted Patent
Utility
US 4,666,304 · App. 06/744,057
Optical measurement apparatus
Inventor:
David E. N. Davies
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Jun 12, 1985
Inventor
David E. N. Davies
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.