Granted Patent
Utility
US 4,549,217 · App. 06/536,713
Automatic contrast reduction circuit for a teletext or monitor operation
Inventor:
Gene K. Sendelweck
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Sep 30, 1983
Inventor
Gene K. Sendelweck
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.