Granted Patent
Utility
US 4,540,243 · App. 06/409,526
Method and apparatus for converting phase-modulated light to amplitude-modulated light and communication method and apparatus employing the same
Inventor:
James L. Fergason
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Aug 19, 1982
Inventor
James L. Fergason
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.