Granted Patent
Utility
US 4,388,648 · App. 06/310,138
Frequency selective DC coupled video signal control system insensitive to video signal DC components
Inventors:
Leopold A. Harwood, Robert L. Shanley, II, James Hettiger
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Oct 9, 1981
Inventors
Leopold A. Harwood
Robert L. Shanley, II
James Hettiger
Assignee (at issue)
RCA 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.