Granted Patent
Utility
US 4,986,639 · App. 07/296,643
Eye protection device against broadband high intensity light
Inventors:
David B. Chang, Brian M. Pierce
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Jan 13, 1989
Inventors
David B. Chang
Brian M. Pierce
Assignee (at issue)
Hughes Aircraft Company
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.