Granted Patent
Utility
US 4,446,557 · App. 06/319,014
Mode-locked semiconductor laser with tunable external cavity
Inventor:
Luis Figueroa
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Nov 6, 1981
Inventor
Luis Figueroa
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.