Granted Patent
Utility
US 4,229,830 · App. 06/044,730
Apparatus and method for providing a modulation format for multiple wideband signal transmission
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Jun 1, 1979
Inventor
John O. Ryan
Assignee (at issue)
Ampex 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.