Patent US 4707727A

Patent number	US 4707727A (click link for details and documents via Google Patents)
Title	Apparatus for providing an indication that a color represented by a Y, R-Y, B-Y color television signal is validly reproducible on an RGB color display device
Inventors	Bruce J. Penney
Company	Tektronix Inc
Filing date	1986-04-08
Grant date	1987-11-17