Granted Patent
Utility
US 4,711,539 · App. 06/746,178
Support structure for protective mask optical insert
Inventors:
James J. Krusas, Joseph J. Pienta
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Jun 18, 1985
Inventors
James J. Krusas
Joseph J. Pienta
Assignee (at issue)
American Optical 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.