Granted Patent
Utility
US 5,189,516 · App. 07/513,527
Video preview system for allowing multiple outputs to be viewed simultaneously on the same monitor
Inventors:
Richard Barry Angell, Kirk M. Gramcko
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Apr 23, 1990
Inventors
Richard Barry Angell
Kirk M. Gramcko
Assignee (at issue)
GRASS VALLEY LIMITED
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.