Granted Patent
Utility
US 5,109,441 · App. 07/642,821
Fiber optic external modulator
Inventor:
Joseph B. Glaab
Patented Case
View Patent ↗
Granted: Apr 28, 1992
Filed: Jan 18, 1991
Inventor
Joseph B. Glaab
Assignee (at issue)
General Instrument 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.