Granted Patent
Utility
US 4,225,228 · App. 06/004,300
Surface coating for optical inspection
Inventor:
Paul DiMatteo
Patented Case
View Patent ↗
Granted: Sep 30, 1980
Filed: Jan 18, 1979
Inventor
Paul DiMatteo
Assignee (at issue)
Solid Photography 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.