Granted Patent
Utility
US 4,528,598 · App. 06/483,328
Chrominance inverting all-pass filter
Inventors:
David E. Trytko, Steven D. Wagner
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Apr 8, 1983
Inventors
David E. Trytko
Steven D. Wagner
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.