Granted Patent
Utility
US 5,105,295 · App. 07/460,471
Four level FSK optical signal transmission with optical decoding and direct detection
Inventor:
Vincent A. O'Byrne
Patented Case
View Patent ↗
Granted: Apr 14, 1992
Filed: Jan 3, 1990
Inventor
Vincent A. O'Byrne
Assignee (at issue)
GTE Laboratories Incorporated
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.