Granted Patent
Utility
US 4,918,718 · App. 07/212,549
Quadrature amplitude modulation with line synchronization pulse for video telephone
Inventors:
Lawrence D. Emmons, Gary S. Fletcher, Jr.
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jun 28, 1988
Inventors
Lawrence D. Emmons
Gary S. Fletcher, Jr.
Assignee (at issue)
Luma Telecom 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.